I think there is a lot to be said for the simplicity of the erlang model. It's not just about stopping a thread from hogging the cpu. The OS doesn't have a go

I think there is a lot to be said for the simplicity of the erlang model. It's not just about stopping a thread from hogging the cpu. The OS doesn't have a good idea when to wake threads up, so they are effectively polling needlessly. I do scala/akka in my dayjob and the amount of time we spend tweaking threadpools (execution contexts) and retesting just to get okay performance is insane. You wear a pretty big cost when you layer on abstractions like that.