He also implies that cgroups are a systemd-only feature.

I remember way back when I was doing Ruby on Rails, we would always wrap the server processes in a manager (I forgot what it’s called) that watches the memory and restarts them when the leaks get too bad. What a ridiculous solution that was.

This has been happening forever. This old post always pops up in my mind for some reason as a historic example from an earlier linux boom.

Unfortunately, people have been pushed to not call out such things, because it's "not nice", when as the blog above shows, not calling it out is what's not nice, and potentially dangerous.