I doubt anyone here will listen to me, but what Canonical is doing in Ubuntu is actually better for system reliability. Developers capable of reviewing systemd on technical merits find that it makes Linux systems less reliable. I do not think that the systemd developers even attempt to dispute this. The issue is that the kernel will panic if PID 1 dies and systemd's design makes it very difficult to avoid failures in PID 1.
Theoretically less reliable or there were people that had actual problems with it?? Because from what i read around its pretty much rock solid.