No, it's the least broken event notification mechanism on all systems. And it doesn't have a 1024 FDs limit on most systems either, as long as it used directly

No, it's the least broken event notification mechanism on all systems. And it doesn't have a 1024 FDs limit on most systems either, as long as it used directly via syscall or through an event loop library that does that. But in general for all event notification mechanism on all systems, it's incorrect to assume that reported FDs are actually ready, because that could cause a busy waiting loop, and incorrect to assume that unreported FDs are not ready, because that could cause timeouts.