Why twin? Except for being legal, there is no reason why we could not fly a properly equiped and certified single in a cloud. Planks do this all the time, why not helis.
Engine failures are rare and one would only have to be a bit more conservative regarding the weather. No problem for private flying and training. Would be helpfull.
Oh, skip it. You are right, 212, it is a déjà vu.