All of those genres can be linked to one another and you can continue on down to extreme levels. Rock, punk, metal, funk, country, soul, and reggae alone barely touches on the diversity of string instrument based music. Is this a naming problem for you?
Every noise at once attempts to show the extremes to which music can be classified if you haven't seen it.
I don't see any signs that this evolution has ever stopped or will stop. Artists are obviously limited by physics, what sounds pleasant to us, the instruments that are available, and what is currently in fashion. That we'd have more unique music in a more isolated world seems like a pretty crazy claim to me.
There’s definitely relationships and cross pollination between genres, but that’s why the lack is concerning to me. It doesn’t directly matter to me if little new shows up, but indirectly I’ll be worse off.
> I don’t see any signs that this evaluation has ever stopped or will stop.
It wouldn’t be difficult to name something as new if there was a lot of meaningfully different new things to name.
Now I’m not saying things will be static, obviously we people will create. But I think it’s clear things have slowed down noticeably, and that means something really has been lost.
Even if you just look at popular artists: Mk.gee, Collier, Domi and jdbeck, Beyonce are some examples of mold breaking.
What exactly are you expecting, cantina jizz? If so there's no shortage of extremely out there stuff.