[TimWolla]

For PHP 8.3, we upgraded production during the RC phase, but were prepared to revert back to an older one by not relying on the new functionality. Docker makes this easy.

As long as you do not use the new functionality, I'd claim that a new PHP version is no less stable than an older one. And on a contrary you would be missing out on some bugfixes that were deemed too risky to apply to an existing version.

Disclosure: I've got a commit-bit for PHP, so we had in-house expertise to diagnose issues ourselves.