История изменений

Там об этом пишут.

Well, systemd is a suite of components that people build OSes from. As such it isn’t really an app you install on top of your OS, it’s more a toolset for distro and device builders. Now, if end users have questions about details how they can uses these devices and distros, then I figure they should always contact the manufacturers of these devices, and the distro developers first.

Or in other words: we are not the final product that people should interface with, we just provide a set of components where other people can build final products out, and by doing so they also need to take the responsibility for providing a first level of help for it.

Там об этом пишут.