So "some typing" would be:

    # git stash:
    prev_ref="$(git rev-parse --abbrev-ref HEAD)"
    git checkout -b wip-stash
    git add .
    git commit -m 'wip stuff'
    git checkout "$prev_ref"
    
    # git stash pop:
    git checkout wip-stash -- .
    git checkout -D wip-stash

It's quite a considerable saving. I suppose by "fix UX" you mean make it so the saving would be less anyway, but I think really they're just conceptually different:

    - branch: pointer to a line of history, i.e. a commit and inherently its ancestors
    - stash: a single commit-like dump of patches

If stashing disappeared from git tomorrow, I think I'd use orphan commits rather than branches to replace it.