@Wolf480pl@niu.moe (That, and systemd also provides sysvinit's config format compatibility.)
This is why you can run pretty much anything that wasn't explicitly written against systemd (and often predates systemd) with systemd. This is why you can pretty much just swap out init systems and have all the services work the same. I imagine the situation on Windows is much different (though I don't know too much about Windows internals).
@Wolf480pl@niu.moe If a service wants to make use of systemd features such as socket activation, than indeed it needs a small systemd-specific codepath that checks if it's even running "on systemd" and does the appropriate setup. But again, this works without systemd (as a no-op) and you don't need this with systemd (but you won't get some niceties).
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