You are right, but vix is near 35 now. That doesn’t happen often, and when it does, it will collaps the next trading day
Yes, the VIX appears to be mean reverting, but it certainly can go higher than 35 and remain elevated for some time. With the correction in October I believe it was below 30 for the entire move.
I wouldn't be surprised to see a large gap down on Monday's RTH Open.