For me, the mainstream takeover of subcultures has always felt very superficial. The subcultures I've been a part of (Pen&Paper, LARP, early Internet, Gothic) have registered that the masses have taken elements as (often purely visual) tokens and this has often led to a "glut" of new people entering into the subculture, but this was usually not long lasting and was often mostly also purely superficial.

There were always people (and niches) in the depths in which one could feel comfortable. However - I must admit - it became harder to find these depths and to get through the superficiality. The niches have become even more self-isolated and it has become more difficult for newcomers with real interest to immerse themselves.