Are you saying it's possible to do a full-blown real installation on USB? I'm confused by the part where you say "run 'live' for a while before installing it". The live versions I ran from USB on my Windows laptop are sort of trial versions with limited capabilities; I think you can't save...
Couple related questions on installing Linux on old Macbook Air.
- Does it work; is there any reason not to; anything special I need to know? I have no need for macOS at all (was given the Air and have never used it myself) unless there's some reason for doing dual boot which I doubt. 2011...