Nice interesting thread, my take, right or wrong, is that classic rock will live on forever. No, not the overplayed crowd pleasing mediocre at best crap but the stuff that remained unplayed over the airwaves. During the "classic rock" era musicians pushed the envelope of possibilities, experimented and rocked the world. Hendix, CSN, ELP, Sabbath etc, etc opened a whole new world. A favored part of listening to classic rock is the discovery of great work by artists which were never played over the air. This is also one of the reasons I prefer LP over any other kind of medium. It forces me to listen to the entire side as I'm too lazy to get up and try to skip a track. I discovered many awesome tracks that way. Sure, there are also duds that I never could get into but overall the experience is positive. Deep tracks are in your collections regardless of medium. You just have to stop yourself from skipping works that may initially not appeal to you.
You can never get that kind of variety from any OTA, or paid service.
Enjoy the music, today's new will be tomorrow's classic.