If it ain't broke...
As part of my job I manage a bunch of Linux VPSs running some websites, including one high-traffic one. They work very reliably, but for a long while I've wanted to replace the main VPSs with new ones.
I've spun up new instances many times, on Rocky Linux, AlmaLinux, or Debian – even FreeBSD – and got them set up with the aim of switching. I also taught myself Ansible to help. But then I procrastinated some more, and never actually went through with it.
The websites use PHP, and are currently running on PHP 7.4, with Apache and mod_php.
For the new machines I modernised it somewhat, and went with php-fpm instead. But the problem is that for me it is untested; I've only ever used mod_php. So I never have the guts to make the move, despite having load balancers to be able to introduce any new VPSs in a controlled manner.
All current advice is to use php-fpm. It is newer, faster, and more efficient. There is literally no good reason to be using mod_php these days.
However, I've finally decided I'm just going to go with what I know; as mod_php is not yet deprecated, I'll simply continue using it with PHP 8.4, and get the servers replaced asap. If it ain't broke...