I think there are some legitimate complaints about it, some of which
K.O.D.
touched on, but I also think a fair amount of the dislike of it is that most folks collecting knives in the $100-$200 range likely now have a LOT of S30V. For practical needs, S30V is more than adequate for me, but this is my hobby, so I generally want more than adequate. I want either excellence or novelty, and as good as S30V is it doesn't particularly afford me either of those qualities. Now, if it's in a knife that offers those qualities through design or some other facet I'll happily buy another S30V blade, but it does very little to move the needle, so to speak, as a material.