3. "I'm pretty sure it's generational. There may be a few artists ..." In response to In response to 2
... who stand the test of time no matter the generation. But mostly I think the window you describe is probably right. Because music evolves so much. Not a lot of us are talking about music from the 20s, know what I mean. And in 2050 I doubt folks will still be celebrating, like, music from the 1960s and 70s like I did/we did when I was in college. Could be wrong but I think they'll more likely be into the best music from like ... now.