I'm one of the types that still listens to "some" of the artists I loved in my teens, but have also tired of many. IMO, based purely on age. Then there were acts I didn't like at all back then that I have since grown to love.
I think that for the casual music lover, you tend to age out of hard and heavy for soft and mellow. When I watch old rare 8mm footage of Led Zeppelin from 69 to 73, and look at the crowd. Those folks in their jean jackets w/ Zep patches all over them, you won't find them on a Zep forum today. They are somewhere sitting on a blanket at a blues/folk/bluegrass festival. The overwhelming majority that ARE on Zep forums today were too young to ever see them.
For me though, the bottom line is it just has to have a human feel. Organic musicianship. I like a lot of current artists. Just none you'll ever have served to you on a silver platter the way music was for 40+ years. Different world. Today you have to put some time in to find the really good stuff. Don’t ever think what’s most popular is all that’s out there. There was also a time when Pat Boone’s vanilla renditions ruled the airwaves while the real goods were spread word of mouth. Music, like most art, is cyclic. Sadly, todays tech is killing everything we loved about music. There are likely Dylan’s/Lennons/McCartneys out there right now, but todays world of corporations owning EVERY major market radio station, YouTube, etc….you can hardly be a big fish in a little pond. And no city has it’s own “sound” anymore. It’s global or nothing, right from the start. How can anyone put in their 10,000 hours….on the internet?