Hello everyone, I'm just adding a few cents into this discussion.
I've voted "yes" because we don't have any other async stuff RFCs available nor in the preparation. PHP needs such functionalities very badly and very quickly to sort of speak. Adding a brand new extension in the core is maybe a strange practice because it usually should go into PECL first and after being adopted by the ecosystem it could be then moved to php-src after a vote. However, practical reasons show that PECL extensions are not first class citizens. In most cases adopting extensions could take even longer. With somehow similar logic, I've also supported FFI extension and even Jit RFCs already in 7.4. Regarding Swoole, Swoole is a great production-ready framework that provides such functionality also already today. It is definitely worth checking out from a user perspective and can live along the ext-fiber just fine, I believe. If Swoole won't be integrated in core (it is a separate standalone project), then hopefully, PHP core could learn and be inspired by Swoole as it's already implemented in production with unbeatable performance. Thank you to the RFC authors and everyone involved in making this happen.
