I don't know - this is a language that can't easily handle concurrency. Instead you mess around with dispatchers. And then you're dealing with thread-unsafe structures, objects, arrays, etc.

This is such a critical thing with todays interconnected apps that i have no idea how they did not worry about it from the start. Having had the pleasure of dealing with threads, mutexes, dispatchers, execution-contexts and the like there is no way i'd pick up a language that hasn't evolved in that regard, especially on a server. Even Javascript has this figured out with stage-3 async/await.