@gnubyte @pid_eins It's actually pretty good. I've tried it for my test VM's running archlinux while testing some kernel patch sets. My Fedora 40 host installation does not have it yet (at version 255).
In addition, it's a pretty nice stick for knocking the ice when testing various configurations related to polkit and PAM.
I've only recently moved my kernel QA from dusty old busybox to systemd (because I noticed that in some kernel features I was lagging over two years of user space progress), and it is definitely one of the more useful features of systemd for my work.
You can also pretty much use anything you want in the foreseeable future. In the end of the day, all of these are roughly front-ends configuring privileged access based on PAM, PolKit, MAC and DAC in varying levels of detail. There's also some other similar tools such as "really".