[monocasa]

It's a huge pain on the ass to setup right. Soft faults where the process is still running but is deadlocked don't get restarted for instance.

[zaphirplane]

Same problem if you write your own supervisor except you are writing a process supervisor

[monocasa]

Well, no, because you can write your supervisor in a way that does protect against that. In fact that's hat they're doing here.