"Linux has systemd" and that's why the author didn't select it supposedly. I hear this line of thought from people that use FreeBSD often, although I suspect if you ask many of those people why systemd is so horrible you won't actually hear a legitimate (and still relevant) reason from them. I suggest anyone that thinks systemd is terrible and doesn't spend lots of time in Linux to watch this presentation by Benno Rice.
https://youtu.be/o_AIw9bGogo