Listen up, 25-year-olds. Ima drop da knowledge bout what's fidna happen to y'all in the next 15 years (musical-taste-wise):
Next five years: Bands get lamer. Nobody's doing anything interesting. Old bands you liked in high school and college have broken up, except for the sell-outs, who still cough up a good song or two. That ex who listened to jazz wasn't so bad, except for the heroin. You get some Miles Davis.
Subsequent five years: All this shit sucks. Everything everyone else knows about popular music is wrong, wrong, wrong. You know -- you have perspective. You get some Bach, but you don't play it around your friends.
The meteor of age 40 strikes planet You: Maybe the music of the past few years hasn't been THAT bad. Younger people seem to like it. Maybe there's some of it you didn't hear that doesn't totally suck. You are adrift. Tastes have irrevocably shifted, and you are No Longer Cool. You try, you struggle, you fail. Some of the stuff you hear is, in fact, good music, but it's derivative: it echoes the stuff you liked twenty years ago.
You sigh, and listen to The Book of Knots.