An init system without the ability to specify dependencies? Without user/group configuration? Ordering must be manually configured? No parallel service launching? No resource management?

Please don't call this an init systern. It's a barebones process supervisor.

It actually does all these things. Quite well, even - in my experience better than systemd.

I didn’t use nitro, I’ve been using daemontools (which nitro is an evolution of) for decades. Incredibly easy to use, incredibly stable, understand, and control.

There is no well defined way to do dependencies (what if your dependency dies 3 seconds into the process? There are many right answers). The djb/daemontools way is just “it’s your problem. But here are the reliable simple cheap tools to start, stop and monitor your dependencies”.