Interesting that you see it that way. I see Haskell and Purescript usage growing, and I don't know many people interested in O'Caml / Reason. Not trying to say you're wrong---just commenting on the effect of our respective filter bubbles.

As for Scala usage. I'm a Scala consultant, so I'm biased, but I'm seeing a lot of adoption. Most finance companies and most media companies are using Scala.