That's not debunked. The small tools of the UNIX philosophy are supposed to compose well with others. If I want to replace systemd's init with that from daemontools (for instance) and keep the rest of systemd working, that should be possible.
Or let's suppose that I want to opt in to systemd's auto-remounting and socket activation (for instance), but for whatever reason I need to keep my syslogs as text on disc, so I can't use systemd's binary logs but need my legacy syslog system. Can I do that?
> I really don't get the systemd "hate" that is still floating around. It seems a lot of arguments against end up boiling down to "it's different and therefore I don't want it".
The arguments I've heard boil down to "it's badly designed and therefore I don't want it."