There is something I saw on YT a year or so ago from a guitar teacher who said that his students have changed over the past 15 years: they used to come in and say "I want to learn this song from my favorite band" - and now, overwhelmingly, when asked what they want to learn, they shrug and start scrolling through their phone to try to find an answer. They want to learn,
but not anything specifically. And often when they have something, it could be the most random old thing, from any era.
That is, the song catalogue has stopped being something that has turnover, it just keeps accumulating into a library of dusty shelves, and that makes it hard for young people to assert norms as in days past and tell everyone "this band that was marketed to my demographic is totally the best and nothing will ever beat them" - which is where a concept of "best song" is going to come from, because hardly anyone is trying to assign letter grades to their listening.
Instead you'll see a more apocalyptic Fall-of-Rome tone in the comments of old hits: "I'm only 13 but I wish I were in the 80's, best decade for music nothing like today's crap". It's so common a sentiment as to be memetic and widely riffed upon.
Something has definitely changed in the music business.