[tombert]

I think you’re missing my point. Even if they were using “real” thread then it then Erlang’s messaging semantics would remain largely unchanged.

Also, it’s not the same thing as async nodejs. Node.js is a fully cooperative system, something CPU intensive can hog the thread and starve the other tasks. Erlang processes are preemptive; every process gets N reductions and then it is parked and the next process can make progress. They’re closer to OS processes than goroutines.