Well, they link to suckless for reasons why systemd is bad. So they most likely have no idea what they are talking about as suckless is known for being mostly factually incorrect.

For example, suckless claims "pid 1 does DNS" and link to https://cgit.freedesktop.org/systemd/systemd/tree/NEWS?id=2d... to prove this. That NEWS entry is about software not part of pid 1, but I guess reading is incompatible with a minimalist approach.