A backdoor in xz

I used OpenRC before I used systemd; it does not, as far as I can find (and even today) offer a proper lifecycle check; in particular, the only queries you can ask it are "is this service running", "is this service known and shut down", or "has this service crashed", whereas systemd adds "is this service running but in the process of shutting down" and "is this service running but in the process of restarting" to that list, which is essential for automated remediation of faults - you know that if a service is restarting, a fault is OK, while if a service is shutting down, you should determine if that shutdown is expected, or if you need to alert a human.