Listening to Oldies on radio sounds different today than it did 20 years ago. Oldies, in radio jargon, generally refers to the rock and roll of the late 50s and 60s, maybe into the early 70s. Twenty years ago, venturing into the 70s meant that a station would probably lose their core listeners, those people born between 1946 and 1960 or so. But today, most Oldies stations aren’t playing much from the 60s, not to mention the ’50s. It’s mostly 70s going into the 80s. Sometimes they refer to this "new" oldies format at "Classic Hits."
The reason is obvious. Ad agencies do not purchase much advertising directed to persons over 50 years old. (Local advertisers covet these people-go figure). The "old" Oldies is now considered a format for folks over 60! I find that interesting because even a lot of 30-somethings appreciate those songs. The old "adult standards," that featured the ballad songs of the 50s and 60s is pretty much gone on terrestrial radio, and on XM they have oldies spread over channels dedicated to specific decades.
But the "boomers" still rule in terms of sheer numbers and buying power. I wonder when a few radio stations will figure this out and quit pandering to rating services and the whims of ad agency buyers and play what older listeners want to here. (Not all stations, just those who want to do what no one else in their respective market is doing.) Rock and Roll Forever!