You can do that with systemd too -- service files are still just ordinary files; they're just "10 lines of info that matters" instead of "10 lines of info that matters + 90 lines of inconsistently implemented boilerplate" :P
More like "10 lines of info that matters + I don't know/no reason to look at that" instead of "10 lines of info that matters + 90 lines of inconsistently implemented boilerplate"
Saying that systemd service files are complicated because you need to take systemd's internals into account is like saying sysv init scripts are complicated because you need to look at the source code to "cat" and "grep"; ie, no :P
Jr: "I edited some init file."
Sr: "Which one?"
Jr: "I forget."
Sr: "Oh." sorts /etc directory by time "Oh, I see what you changed. That is wrong because of $REASON. You should do $CORRECT_THING instead."
Jr: "Okay, thanks for letting me know."
Sr: "We were all new guys once."