I don't get why RV are so revered with i-fans

I get their music is good but it's really nothing different than say, f(x). They're not great performers either. None of their comebacks had any memorable aspects so far. Wendy is a good singer but rarely gets to showcase it. The others are good looking and have clear skin. Great for CF's, not for streaming music.
SM don't seem to have a clue what they're doing with them, still. Dumb Dumb was their most cohesive release. Other than that, it's a free for all whichever concept sticks music and visual wise.