Mixing being editing recordings of individual instruments to make them sound good together, not making mixtapes or doing live mixing like someone like skrillex might do
Tried EDM once, never published it, or tried it again.
Disco, or any genre that's not quantized is really hard, because you can't rely on sync'ing, at even beatmatching is harder because it's usually a real drummer playing the beat. Anything with live drummers where the DJ does any blending at all. So… funk, soul, r&b, some 80s, etc.
Oh I was talking more individual track processing not like live playing two songs at once type of mixing haha