I'm not a heavy Linux user -- I mainly use Windows and FreeBSD -- but I'm curious to know why none of the Linux distros have looked at using launchd? It's being

I'm not a heavy Linux user -- I mainly use Windows and FreeBSD -- but I'm curious to know why none of the Linux distros have looked at using launchd? It's being ported to FreeBSD (https://github.com/rtyler/openlaunchd); https://github.com/rtyler/openlaunchd); is there some reason it couldn't work with Linux, or is it just being overlooked/ignored? I have heard that launchd doesn't have all of the features systemd does, but launchd does seem to be fairly solid for the features it does support.