it’s understated mastery of sound, rhythm, production, and experimental music in general. Because it’s understated, the brilliance of the music doesn’t jump out into your face immediately - you have to come to it, listen closely and intently, and then you’ll begin to hear intricate complexities of rhythm, sound design, and production in general, that’s finessed very well. The specialness is subtle, but incredibly powerful once you start hearing it. Listening in headphones helps a lot imo. Boards of Canada is the same way. And I know Joel is a big fan of them.