The link doesn’t work, how about posting the text of the article?

The point is that he explicitly makes this hard. That’s why he is a twat. The issue is that some applications (especially graphical) do get heavily integrated with it which makes it also hard to port them.

Honestly, systemd isn’t bad, because a one concrete program will always be more reliable than bunch of bash scripts tied with rubber bands and bubble gum, but Poettering is a twat by making it (purposefully) non portable.