Well, one thing I'll give Kurt and Nirvana: They single-handedly killed the 80's heavy metal, hair band crapola. If for no other reason, we should be grateful for that.
Like it or not (and I didn't particularly), anything Quiet Riot or Twisted Sister did was a hell of a lot better than anything Cobain ever listened to, much less produced.
Nobody would have ever heard of this idiot had he not blown his brains out. The reason he used a shotgun is that he would have missed with a centerfire.
Kinda like how "The Knack" killed off disco.