This post on deep-dive perf improvements in #WordPress’s back end is great.
I worry that people doing this important back-end grinding are few and far between and with the focus on JS increasing in the project people that understand these topics and do this work will continue to decrease.
It’s still a PHP project too!!
https://developer.wordpress.com/2023/08/24/speedier-php-execution-in-wordpress-6-3/