Though you seem to want systemd to start things in the same order each time and have it be predictable, that's pretty impossible. Systemd works more on the basi

Though you seem to want systemd to start things in the same order each time and have it be predictable, that's pretty impossible. Systemd works more on the basis of "this happened; what should be done now?". Seems adding something to record how it started things and why it did so would help quite a bit. There's some debug mode where it limits how much it starts at once. Then some way to visualize this easily (not just a GUI/picture).