I know very little about systemd, but it sounds like it solves some issues. The only concrete thing I've seen is starting up services, which has traditionally been idiotic on Linux distros, needing silly boilerplate scripts copied all over. Even Windows does this better in a way.

Independently though, if it's so bad and do obvious that it's bad, why is every major distro picking it up? Is RedHat leaning on Arch behind the scenes?