I was specifically comparing it not just to sysvinit replacements, of which there are many, but trying to bring a lot more features.

Launchd doesn't count, I already mentioned MacOS specifically to account for it. :)

SMF has some features beyong sysvinit that systemd also provides, but I'm not familiar enough with it's advanced usage to know how much beyond the obvious ones (service restart, etc) it does, so I'll try to take a look.

I don't know anything about the IBM one, so that's worth taking a look at. Thanks!