> In my opinion [1,0] is far more obviously an empty range than [1,1) but that's just what it is, my opinion.

On its own, I think that's a reasonable contention, but it doesn't work when combing intervals: [1, 1) combined with [1, 2) is still [1, 2), but [1, 0] combined with [0, 2] isn't [1, 2].