I can't speak for how it works in metal, because I don't really know, but I can tell you that nobody takes those subgenres seriously in jazz. The big argument in jazz is whether something is jazz or not, whether it belongs under the big umbrella at all. That's where teeth are gnashed and the bickering happens. Nobody cares whether it's really bop or hard bop; whether it's third-stream or avant garde. The definitions exist for those things, but they aren't relevant to discussions about the music.Okay Ben, you can put the straw man away, I surrender ... I just searched for jazz subgenres and there were oodles, though I hadn't heard of some and suspect there's some of it is overly fussy.