It's kinda true if you're just using the system primitives directly (kqueue, epoll, whatever) but people tend to build abstractions over those and then offer ca

It's kinda true if you're just using the system primitives directly (kqueue, epoll, whatever) but people tend to build abstractions over those and then offer callback scheduling libraries for their users, and away we go. IMO, we haven't really seen a natively compiled and manually memory-managed language "get it right" yet. There are pretty good third-party abstractions for it though.