- seamless container logs (journalctl), no weird separate logger

- service start/stop/enable-at-boot no weird separate command

- integration with system/user slices, triggers, cronjobs (timers), exposing containers as first class commands overall!

Basically it's worth seeing container services work with non-container services.

If you don't like systemd, or have no stake in it, sure, have fun without it, but it's definitely added value when you're running services, and want to start containerizing some of them without abandoning all the good tools you are using in favour of docker logs docker run etc.