If what you say were true, the only people who would be attending a Bruce Springsteen or a Santana concert today would be old men over 70 with kinetic problems and canes. Is this what you see?
Precisely. More to the point, I don't remember seeing a GenZ kid buying Fairport Convention or Crosby, Stills, Nash and Young or Emerson, Lake and Palmer or Weather Report (all pronounced everlasting at one point in time)
As I said in my previous post, even if I saw A GenZ kid buying such an album, it still wouldn't mean anything if the kid had parents who played those albums while the kid was young. You skipped over this idea in your effort to prove your point and I can respect that, but I still insist that the only relevant statistics would be among young kids whose parents were into some other kind of music or non at all.
So, in my opinion, as long as parents of GenZ think similar to you, you will find kids listening to these bands. But let's move further, let's talk Gen Alpha... What do you say now? The mere steepness of the drop should be a valuable indication.
Unfortunately, a lot of parents, believing firmly in the superiority of their idols from the young days, will have no problem forcing their kids to spend time listening to old music. And not only that, but the mere fact that the parents will play their music while kids are young will shape the musical taste of their kids. Still, I think it is in decline.
Just as it is in other topics; if someone is convinced he has healthy eating habits, he'll believe he has the right to force you into it, if someone is not smoking, he'll think he can annoy the hell out of you for smoking, the libs will believe that their labeling people with every "-fobic" they can think of or with crap like "cisgender" is justified because they believe to be morally superior, although a huge part of their struggle was against the very labeling.
When people believe they're right, they are at their worst. I never met music loving parents who truly believe the music of their youth was better, but still in no way try to influence their kids. But, much to my horror, the ease with which they say they forbid them to listen to certain kinds of music and play Queen and such bands for hours, is just terrifying.
In short, the statistics that could effectively disprove what I'm saying should point out the percentage of today kids who didn't grow up with Bob Marley being often played as this would mean they chose Bob Marley. Or any other huge brand.
I'm not young myself and I grew up with my father's records, but I try to prevent myself from acting like the aforementioned priest from the beginnings of The Beatles.
Don't get me wrong - no era will be ENTIRELY lost given there's a way to record and save the music made in it. But to say: "music is dead, because Led Zeppelin... " I just don't see it.
BTW, if you're into statistics, check the number of albums sold by Taylor Swift (and I even can't stand her music)! Even compared to some high-rollers today like Jay Z and Beyonce, she is way ahead, but the main point is she sold more albums than some of the "everlasting" combined.