My preference is for erlang. I believe it is the only one that does concurrency "right", though I don't know the others well enough to prove it. Any blocking,

My preference is for erlang. I believe it is the only one that does concurrency "right", though I don't know the others well enough to prove it. Any blocking, as in transactional memory or locks is, in my opinion, a real concurrency problem. As I learned erlang and OTP I kept finding design choices I really appreciated. The pragmatic programmers book on erlang was written by the creator of the language and I think is one of the better programming books ever. Clearly he's spent several decades teaching this language to perplexed students, cause he found the right way to illuminate it.