And I think this is a result of the opposite of what you're thinking. The subcultures you used to see were one of maybe a dozen. It was easy to see them and notice them because they were quite large and you couldn't miss them very easily.
Nowadays, the subcultures are so diverse broad and specific that you really just will never hear about them if you don't go looking for them
Goes for the musical artists. Do you want unique and distinct music? Go online, search for random off the wall genres, and you're going to find little vibrant community surrounding them.