After over a decade using systemd in arch and Debian, I never had any direct issues with it. However, I never truly got my head around it or got comfortable with how it functioned. I recently swapped arch for void which uses runit, and after over a month using it I to an amazed both how clean and simple it is, how everything just works, how easy to interact and use runit is and am blown away by boot and shutdown times. My arch / systemd setup was heavily optimised for boot, and I thought was quick, but runit starts in about 4 seconds and shutdown is about 2 seconds.