FrankenPHP
Adopt
Our first experiments with FrankenPHP have been working fine for us, and we'll keep testing and using it for our PHP projects when we require an alternative PHP runtime.
Assess
FrankenPHP is modern PHP application server written in Go on top of the Caddy webserver.
FrankenPHP is a new PHP runtime based on the Caddy webserver and build by the folks behind API Platform. This makes it an interesting solution to dive into.