Much as we do with our event photography when we download images to a couple of Mac Minis with identical specs from our desktop for slideshow purposes....The shortname only comes into play if you decide to connect to that particular Mac to swap files between the two.
Although we had the prescience to call them xxx1 and xxx2, others may not have, or has been noted, want to change an existing name on a new to them unit.
Just because you don't find it useful, Lars, doesn't mean someone else won't.
Chill.