“Any sufficiently complicated concurrent program in another language contains an ad hoc informally-specified bug-ridden slow implementation of half of Erlang.” — Robert Virding :: First Rule of Programming
A language can’t be separated from the platform it runs on and the JVM has really good concurrency primitives, so a lib written on top of them will be top notch. Furthermore, the JVM will run circles around Beam with its state of the art GC and JIT compiler. (Not trying to start a flamewar, I really like Erlang, but the JVM is really incredible)
