I've made a similar "rant" before on this in the hopes to change someone's mind so I'll give you the shortened version. And I don't mean this negatively, I mean it as encouragement!:

Music can be an active or passive hobby. Most people fit the latter category and the older you go, the more it skews that way. Adults have a lot less time to experiment and if you aren't actively seeking out new music, you can fall into the trap of "they don't make it like they used to"

But they do! It's out there! You're just less likely to stumble upon it because not only do you lack the time, the people around you are in the same boat. We've also heard a LOT of music since our teens so fewer songs feel fresh. There's no such thing as "derivative" if you've never heard the original!

I'm an active hobbyist who listens to 20+ hours of music I've never heard before on a weekly basis and can guarantee that music in pretty much every single genre is still around.

So I would encourage you to spend a couple hours exploring some time. Even if it's just googling "modern bands like [old band] reddit" and seeing what the music hobbyists have to say, I think you'll be pleasantly surprised.