@darkghosthunter @Girgias @php For which?
Fibers are just as async as JS, but nicer as they're not colored. Itd just a matter of tooling on top, which exists, but most sites don't actually need.
The existing IO layer is sync. Building a complete second async IO and streams suite is... Not for the faint of heart. Rust wouldn't change that much.
Baked in webserver, eh, why? There's already FrankenPHP if you want. It's not critical for an interpreted language like it is for Go or Rust.