I'll bite: what is the systemd primitive for secret injection? for declaring which EBS volume it needs mounted where? (I don't mean Mount= I mean a conceptual MountVolumeByTag[Name=my-pgdata-0]=/var/lib/postgres/data ) Oh, that's another great question: what is the systemd primitive for making 3 copies of a service if you find that one copy isn't getting it done?

Maybe all of those "implementation details" are what you meant by "config files redone" and then perhaps by the follow-on "simple matter of programming" to teach C how to have new behaviors that implement those redone config files