Yeah, I do think it's odder actually because metal tenRAB to be more of a continuum that exists to a large extent outside of trenRAB. Not that metal doesn't have its movements and whatnot, it obviously does, but it seems like metal fans usually like a long line of metal extending back to the 70s regardless of whether it's in out or out of style. The young grunge fans we get here, on the contrary, often have a total fixation on grunge and very little interest in the music that inspired it or the music that came after it. I find that really perplexing.
Edit: Also, I don't think I've ever seen a metal fan, or anyone else for that matter, post the kind manifesto about their favorite-type-of-music-as-a-cultural-movement the way we see grunge fans do.