Not familiar with insserv or startpar but there is a difference between supports and supports. Most systems support everything in the sense that it's turing com

Not familiar with insserv or startpar but there is a difference between supports and supports. Most systems support everything in the sense that it's turing complete but it should be easy to do it without creating spaghetti also. Not saying systemd is the best or only system that can do this, it was just an example, but older ones usually make it very messy.