From a certain perspective, popular music is bound to become, uh, popular... There's a much bigger difference between Bach and the Beatles than between The Beatles and whoever is a big pop star today.
Both are the result of democratization (some could be tempted to call it degeneration), one is just in a more advanced state of, well, putrefaction.
That's coming from a die-hard Beatles fan. Everything is relative.
Tool has just announced a new album for 2018 - there still is some good music out there. It's usually just not topping the charts.
For me, anyway, it's a non-issue. I've long stopped looking for new music and decided to focus on good music - regardless of when it was released. Since both are often mutually exclusive, I waste a lot less time this way. Granted, most of my favorite music of the last few years was written centuries ago or recorded in the 70's, but one needs to prioritize. You've only got so much time on this earth.