SystemD started as a pure init system then added a lot of features over time.

Which is either good, if you actually just want something that works, or very bad because you are violating the purity of the Unix way.

Oh, and the best part, a lot of those people loudly against SystemD then praise what Apple did and the whole discussion quickly devolves into an insane "do this! no not like that! because rEaSoNs!!" shitshow.