Actually, now that that page loaded, I see that systemd debugging is actually much like I described. So my complaint is just that the first-level myth busting didn't say that, but hid it behind a flaky link. Lennart says "Some people try to imply that the shell was a good debugger." but (a) the shell actually is a great debugger, when you have good command-line tools and (b) that's what systemd actually provides. I think this exemplifies the biggest myth about systemd, which is that, in order to get any benefit from it, you have to entirely redo your system and learn all new stuff; this mostly comes from systemd developers saying (probably accurately) that each thing in your old system is terrible and you'd be better off replacing it.