That goes back to my point about choice. Back in the 70s you had to listen to Gary Glitter, Abba, Elton John or Bowie being belted across the two or three radio stations available in your area, and unless you were a real muso that's all you were exposed to hence they transcended all age groups and genres. Nowadays, pop onto YouTube and you'll be presented with all the stuff you, as a subscriber, already like, so unless you're willing to spend some time delving deep to find new stuff the oldies will always come out on top. Same with Spotify/Apple/Amazon music etc, and the repetitive radio stations that cater for those that just want to hear what they are familiar with. Instead of playing it safe, music should be a journey into the unknown - sometimes you'll unearth a gem on your travels.