Learning how to play an instrument/make music has been more accessible then ever since the internet.

Also acces to musical trends worldwide, no longer are we bound to what the radio is willing to play.

This leads to an explosion in blended styles that you can’t define modern music into anymore. This might explain why you feel this way. The culture is completely different.

That said all this new stuff is still a continuation of the music that came before. Its an evolution and knowing the older stuff is still a huge leg up to understand the stuff that comes out today.