Internet definitely has changed subculture dynamic, in a way I'd call narrower and deeper. On one hand internet has allowed subcultures of all sorts to flourish by allowing like-minded people to connect beyond geographical (and also social) boundaries and form their own communities. The flipside being that as more of the interaction happens online in those communities it also spreads less outside, even more to meatspace. Another aspect is that because internet allows everyone to find their own separate sub-culture and community, there are less such stark generation-defining sub-cultures happening. There is sort of filter bubble effect going on.