> User-level runtime, which is trying to do kernel's job is a problem, but being mostly-functional it, at least, have no threading/locking problems - so it scal

> User-level runtime, which is trying to do kernel's job is a problem, but being mostly-functional it, at least, have no threading/locking problems - so it scales. Nothing much to talk about. Spoken as someone who has never really used it. Dismissing it as nothing much to talk about is ridiculous.