One unique feature of the Amiga that I've not seen referenced here is that programs, scripts etc. could reference removable media by label and if the media was not in the drive when needed, a Kickstart-managed requester would pop up asking for it to be inserted promptly. This made it very easy to manage even a single-floppy-drive system. Linux could support this even now, as all the required pieces are there (e.g. au…
eg in the file dialog of GUI app 1 saving a file to something (I forget the details) like PIPE:foo, then in GUI app 2 opening that data from PIPE:foo without it having to go to disk (I suppose when you're dealing only with floppies that is a bigger deal than now).
Am I hallucinating? ;)