[wtetzner]

It depends on what you mean by "take off", and what type of STM you're talking about. I use Clojure's STM regularly, and to great benefit.

[dwhitney]

Yeah, I agree with wtetzner, I've been using STM in Scala via both ScalaSTM and Akka for almost 2 years now. It's incredibly easy to use and I use it far more than any of the other concurrency controls out there. I've written a blog entry about how to use STM in Scala and some pitfalls to avoid: http://outputstream.io/dear-scalasphere-why-arent-we-talking...