I was just talking with a friend about how when we were teenagers, we missed out on a lot of cool stuff, simply because we thought ourselves too punk rock and therefore above tolerating anything we deemed "mainstream." I regret that narrow-mindedness and am glad we grew out of that.
On the other hand, these days I'm anything but cool, even in my own mind, and I can't imagine listening to the new GNR. But I still think "Appetite" is something special that still standa apart even today.