I'm running Gentoo with the default SysV-style OpenRC init system. The boot time is short enough to not bother me. Is there any reason to try systemd?
Ther are multiple advantages of running systemd even after booting is done, some might interest you, some might not, a quick summary:
- Service Monitoring: systemd can monitor services and restart them on failure while most clients will not even notice the service has restarted.
- Clean management of services: in systemd your current environment variables do not influence the environment of a manually started service.
- Watchdog support: if you are on server hardware or an embedded platform (or even on some desktop platforms) you can have systemd talk to the hardware watchdog and trigger a reboot when critical services fail.
- Start less on startup: while this is mostly a boot speed improvement, it also minimizes memory usage since less services are loaded into memory.
- The journal: An easy and reliable logging daemon which logs more metadata than your classic syslogd, and allows you to easy filter on this information
for more information i redirect you to the systemd homepage