Disco was a fad, rap/hip-hop is here to stay.
Orchestral music, opera, jazz...they ain't dead, either.
Weird Al Yankovic is still around, too, and I've never found him amusing in the least BUT...some people still do.
I'm sitting here ripping music into my music server, culling recordings that make me think, "what was I thinking?" Here goes Public Enemy immediately after Paul Simon... (I don't have that many "P" artists, hmmmm)