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alchemist has been in a zone since about 2010-2011. it's like he found his style and polished it to make it truly his. his style is like soul mixed with progressive rock, random obscure sound effects, obscure vocal samples, drum breaks chopped up, somewhat minimalist, and the whole thing ends up having a somewhat retro sci-fi feel but still soul/rock and hip hop. so many things i named, it could easily all spimd like a mess but somehow Alc makes it work. even the way it's mixed sounds "off" but still works.
if we were to compare to other producers, i'd say his style is like Rza, El-P, Primo, Muggs, and Bomb Squad, all rolled up in one. you can hear the inspiration but it doesn't feel at all like he's biting anyone.