Plenty of stuff still uses it, unfortunately. Performance is pretty janky, I just moved a Mediawiki install from Apache+mod_php to Nginx+php-fpm as part of getting the site(s) on kubernetes and it’s tremendously better to work with and uses less memory due to not needing mpm_prefork.

We went from php_mod to php-fpm but we started moving back to php_mod after php 7 came out showing the benchmarks.

That's true for us as well with our legacy applications.

Our newer applications are using litespeed instead, and we've found it to be significantly better. You basically get the features of a nginx + apache + varnish stack in a single easily managed service and with better performance too.

I think its the default on Plesk installs