What I usually find happening is somebody will come up with a simple idea that is very creative, destinctive, and catchy. If it catches on, people make that idea more and more complicated. Now eventually people get sick of the whole idea, about that time somebody else comes along with a simple, creative, catchy idea that sounds totally different...

There seems to be this perpetual cycle of simplifacation, expansion, then resimplifacation in music.

It's really interesting for me to think about.