Can't many of these also be local filesystems?

And I don't like the change to fsck -- why?

Which ones could be local filesystems? I'm not sure how GlusterFS, or Ceph, could be available that early in the boot sequence. The list was gathered from systemd source code, mountall (Upstart mount helper) source code, and Debian init scripts.

As for the fsck change: I thought it would be best if the fsck and mount commands operate on the same mountpoints and with the same information. Anything less might produce inconsistent results. Is a fsck even useful for remote filesystems?

If gluster is started in the ramdisk for some reason, it could very well be running at that point.

From what I have seen while digging through dracut, they fsck themselves before mounting anything (typically / or maybe /usr).