Another daemon for managing control groups

Another daemon for managing control groups

There is an analogous standard for exchanging parts of the systemd *entire system*: fuck off.

I think this statement could use some fact-checking. See, for example, the systemd Interface Portability and Stability Chart, which documents various components of systemd (it's not one single big program) and their interfaces.

It would be quite possible to use some of systemd's components in different contexts without also making systemd PID 1, or to swap them out for different components while adhering to the published interfaces. This doesn't exactly look like an »all or nothing approach«, even though the systemd developers seem to attempt to offer a toolkit that covers most use cases by default.