I noticed this the other day at work. A guy I work with was listening to the oldies station whose logo was "The best of the 60's and 70's". I distinctly remember my parents listening to the same station years ago and all they played was 50's music.
I guess the times they are a changing.
The oldies station in Atlanta went to a rap format about a year ago, leaving this poor 'boomer without any FM oldies station anywhere on the dial.
Thankfully, our little AM 1240 station in Brevard, NC ("The White Squirrel Station") plays real oldies every day. I even heard "The Ballad of Davy Crockett" the other day, from the early fifties.
They also play jazz, big bands, bluegrass, "make believe ballroom" dance music, and some really nice accoustic stuff that can't be categorized. But NEVER a rap song.
It's what radio should be.