The last PRs for synchronizing changes form the official api-platform were approx. 1 year ago:
#3304
#3255

In the meantime, the following changes were added:
api-platform/api-platform@7642f86...main

The biggest change is the move from php-fpm to frankenphp, which came out beta last month (https://laravel-news.com/frankenphp).

Do we plan to switch to FrankenPHP as well? Or do we judge this as too early?

The biggest benefits I'd see:

• PHP and Caddy in 1 container instead of 2 separate ones
• Potential performance benefits by running Symfony in worker mode (similar like node; boot once and then serve all incoming requests). Of course, performance improvements would need to be tested and verified first.

Remaining:

• upgrade to Postgres 16
• FrankenPHP runtime mode