> I've never had a non-trivial debug issue caused by trouble using semaphores, mutexes Sure, those are easy, but they don't scale. You'll often want non-block

> I've never had a non-trivial debug issue caused by trouble using semaphores, mutexes Sure, those are easy, but they don't scale. You'll often want non-blocking instead of semaphores for higher levels of parallelism and thats where you'll run into trouble.