Metal is the same, often it's the true(TM) fans who come up with the micro-genres as a way to beat people over the head for not knowing that "foo" is "bar".
It's the pretentious of wine culture applied to music basically.
It's the pretentious of wine culture applied to music basically.
All music eventually starts to sound boring and micro genre is how fans find what they like about genre and continue enjoy it.
I don't understand craft beer fad and obsession, but I know beer has many tastes and many interesting stuff can come out. Why would I call someone pretentious just because they develop something I don't care about.