Was reading something about this the other day, their conclusion was that, there are still scenes, they just happen in a blink of an eye these days.
They gave the reason with something like punk, you made a real investment to be part of that scene, you spent a few weeks wages on shoes, another few weeks wages on clothes, and wore them till they wore out, scenes had more longevity.
Now, for not wanting to be out of fashion or maybe because the internets speeded everything up so much, movements are just a lot more fleeting, almost like memes or something.
I am over 30 mind so really, I have no idea…