Explanation: The source material indicates that the 'Oldies' genre typically encompasses music from the mid-1950s up to the 1980s, not exclusively the 1950s and 1960s.

Explanation: Contrary to the premise, 'Golden Oldies' typically refers more specifically to music from the 1950s and 1960s, whereas the broader 'Oldies' category can extend up to the 1980s and beyond, depending on the radio format.

Explanation: The source material explicitly lists Doo-wop, surf music, and soul music among the diverse styles commonly included within the 'Oldies' category.

Explanation: The source material notes that artists like The Osmonds and Barbra Streisand are often notably excluded from Oldies playlists, despite their popularity during their respective eras.

Explanation: The 'eternal jukebox' concept indeed refers to a select group of songs that have achieved timeless appeal and are consistently played at events catering to a wide range of age groups.

Explanation: The 'Oldies' genre is broadly understood to cover music originating from the mid-1950s through the 1980s, though its definition has evolved over time.

Explanation: Contemporary R&B from the 2000s falls outside the typical scope of the 'Oldies' category, which primarily focuses on music from the mid-20th century.

Explanation: The term 'Golden Oldies' is generally more specific, referring primarily to music from the 1950s and 1960s, whereas the broader 'Oldies' category can extend to encompass music from later decades.

Explanation: The Beatles are consistently cited as artists whose music is frequently featured on Oldies radio playlists, representing a core component of the genre's appeal.

Explanation: American folk revival music is explicitly mentioned as a genre that is commonly excluded from traditional Oldies radio playlists, alongside instrumental beautiful music.

Explanation: By the mid-2010s, the 'Oldies' format had largely evolved to focus on music from the 1960s through the mid-1970s, often emphasizing soft rock and easy listening genres.

Explanation: The 'eternal jukebox' concept refers to a curated selection of enduring songs that maintain popularity across generational divides and are frequently played at events.

Explanation: In contrast to 'Classic Hits,' the 'Oldies' format by the mid-2010s was typically associated with music from the 1960s to the mid-1970s, often emphasizing soft rock and easy listening styles.

Explanation: The term 'Oldies' has historical usage predating the late 1970s, having been applied to traditional pop songs from earlier decades even in the mid-20th century.

Explanation: The popularity of the film 'American Graffiti' is widely credited with fostering a renewed interest in 1950s nostalgia during the early 1970s, which subsequently influenced the development of radio formats focusing on that era's music.

Explanation: Conversely, new FCC regulations regarding simulcasting in the 1970s encouraged FM stations to develop unique programming, thereby fostering the creation of distinct formats.

Explanation: The year 1982 marked a significant period when numerous AM and FM stations began adopting full-time Oldies formats, predominantly featuring music from the 1955 to 1973 timeframe.

Explanation: The 'Oldies' format began to emerge as a distinct programming style primarily in the early 1970s, rather than the late 1960s.

Explanation: KOOL-FM in Phoenix is cited as one of the pioneering radio stations in adopting and playing Oldies music, particularly focusing on the 1950s and early 1960s.

Explanation: In the late 1960s, some FM top 40 stations began incorporating older music alongside current hits, but not exclusively, and this was part of a broader strategy to appeal to adult listeners seeking variety.

Explanation: The 'Solid Gold' syndicated format was often employed on FM stations as a means to comply with FCC regulations concerning simulcasting, encouraging unique programming on FM frequencies.

Explanation: The 'Oldies' format began to establish itself as a distinct programming style in the early 1970s, influenced by factors such as the movie 'American Graffiti'.

Explanation: KOOL-FM in Phoenix is identified in the source material as one of the pioneering stations in playing Oldies music, specifically concentrating on the 1950s and early 1960s.

Explanation: 'Dick Clark's Rock, Roll & Remember' is cited as a prominent example of a syndicated radio program dedicated to the Oldies format.

Explanation: The 'Classic Hits' format generally encompasses a later period, often including music from the early 1970s to the early 1990s, distinguishing it from the core 'Oldies' era.

Explanation: Indeed, by the mid-2010s, the 'classic hits' format had evolved to center its programming on music from the disco era and the 1980s, encompassing pop, dance, and rock genres.

Explanation: By the mid-2020s, the 'classic hits' format had evolved significantly, encompassing music from the late 1990s and early 21st century, diverging substantially from the traditional 'Oldies' focus on earlier decades.

Explanation: The 'True Oldies Channel' was conceived to counteract the trend of Oldies formats drifting into later decades; its primary focus was on earlier music, though it eventually included some 1980s selections.

Explanation: By the mid-2010s, the 'Oldies' format had generally shifted to encompass music from the 1960s to the mid-1970s, focusing on soft rock and easy listening, distinct from the 'Classic Hits' format which by then often included 1980s music.

Explanation: 'Channel drift' is the term used to describe the phenomenon where radio formats evolve over time, gradually shifting their musical focus and target demographic away from the original format.

Explanation: The 'Classic Hits' format is characterized by its programming of music from the early 1970s through the early 1990s.

Explanation: The 'classic rock' format is distinguished by its focus on album-oriented rock from the late 1960s to the 1990s, contrasting with the more pop- and single-oriented nature of the 'Oldies' format.

Explanation: Scott Shannon's 'The True Oldies Channel' was conceptualized as a countermeasure to the tendency of Oldies formats to incorporate music from later decades, aiming to preserve a focus on earlier eras.

Explanation: On July 12, 2007, WCBS-FM reinstated its Oldies format, albeit updated to include music from 1964 to 1989, repositioning it as a 'Greatest Hits' offering.

Explanation: By the mid-2020s, the 'Classic Hits' format had expanded its repertoire to include music from the late 1990s and early 21st century, notably encompassing the hip-hop era.

Explanation: Traditional Oldies stations often utilize a limited playlist, typically around 300 songs, which leads to heavy rotation rather than the use of large, rotating playlists for freshness.

Explanation: The rationale for limiting playlists to around 300 songs is to maximize listener retention through familiarity and repetition of hits, not to introduce new music.

Explanation: The source indicates a divergence in playlist strategy during the 1980s, with some Oldies stations employing highly focused playlists of around 300 songs, while others maintained substantially larger libraries, up to 1,500 songs.

Explanation: A significant drawback of employing a restricted playlist, often limited to around 300 songs, is the high frequency of song repetition, which can alienate active listeners.

Explanation: The primary rationale for limiting playlists to around 300 songs was to ensure listeners remained tuned in by consistently hearing familiar and popular hits.

Explanation: A viable strategy for mitigating excessive song repetition involves periodically rotating different songs into and out of the playlist, thereby introducing variety.

Explanation: The 'Kool Gold' format is identified as a satellite-distributed service specifically focused on Oldies music, not contemporary pop.

Explanation: Contrary to general avoidance, public radio stations have embraced the Oldies format, with some featuring it on their main or digital subchannels.

Explanation: Satellite radio services like XM and Sirius initially provided extensive libraries with significantly less repetition compared to terrestrial radio, offering a much broader selection of Oldies music.

Explanation: The shortwave station WTWW operated an Oldies service until 2022, after which its programming was moved to a different frequency, demonstrating the continued presence of Oldies on various broadcast platforms.

Explanation: Initially, satellite radio services like XM and Sirius offered substantially larger music libraries, resulting in considerably less song repetition compared to the more constrained playlists common on traditional broadcast stations.

Explanation: XM and Sirius initially adopted a strategy of launching numerous Oldies channels, frequently dedicating individual stations to specific decades from the 1940s through the 1990s.

Explanation: In the 21st century, Oldies stations began limiting selections from the *earlier* periods (1950s/early 1960s) and expanding to include music from the 1970s and 1980s, primarily to appeal to advertisers by reaching a less aged demographic.

Explanation: The shift from Oldies to Jack FM by WCBS-FM in 2005 elicited significant listener outcry and a subsequent decline in revenue, indicating a lack of widespread approval.

Explanation: As of 2020, music from the 1960s was increasingly rare on mainstream radio playlists, with very few songs from that decade appearing in the most played lists.

Explanation: The text indicates that a majority of songs showing the greatest drop in popularity by 2022 originated from the 1960s, highlighting a trend of diminishing relevance for some music from that decade.

Explanation: The 'Jack FM' format is a distinct radio format that some Oldies stations transitioned to, rather than being a sub-genre of Oldies known for its deep library of 1950s and 1960s hits.

Explanation: Around 2002, many Oldies stations began phasing out music from the 1950s and early 1960s because the demographic associated with this music was perceived by advertisers as less desirable.

Explanation: The abrupt switch by WCBS-FM from Oldies to Jack FM in 2005 provoked substantial listener protest and led to a subsequent decrease in the station's revenue.

Explanation: KRTH 'K-Earth 101' in Los Angeles is cited as an example of a successful major-market Oldies station currently operating.

Explanation: As of 2020, music from the 1960s was noted to be increasingly scarce on mainstream radio playlists, indicating a decline in its prevalence.