Alright, I'm sure some people find Go's particular combination of features appealing. For me, a language has got to be so unbelievably awesome to consider leaving the JVM, and seeing that some of the most awesome languages target the JVM, that language better do something that would truly impress a veteran like me. There's only one non-JVM language that I'll use for some very specific applications, that I think is all that: Erlang.