But they shouldn't have to. Changing a default, known, long used feature of UNIX-like OSes without any sort of announcement or debate is dangerous and irresponsible. This kind of thing is why I feel the encroachment of systemd into most Linux distros is a bad thing.
It's a great system in theory and I am excited about its potential, but it has some extremely egotistical and irresponsible developers who don't give a damn about what they break, as long as they can keep pushing code out without community testing or review to slow them down. Debian was flat out wrong to go with systemd until it reaches a certain level of maturity and stability, but there's no going back now.