It is not a weird point because systemd imposes the use of non-standard interfaces on daemons to be regarded as good citizens of the systemd OS. So porting daemons that do this to another Unix becomes significantly more than locating and fixing a few edge cases that are handled differently.
I suppose that's true. I was saying gp's point that portability was a burden was weird. As if anyone who touched sysvinit was cursing at themselves in fury because they needed to support BSD (which doesn't use it).
