That's not an inherent problem: bsd's rc.subrs and similar systems exist, which fix this issue in a sysv/bsd style init system. They don't even technically requ

That's not an inherent problem: bsd's rc.subrs and similar systems exist, which fix this issue in a sysv/bsd style init system. They don't even technically require patching init itself. Systemd's problems are deeper in. One major one is most of its design, and its entire conception.