The main point however is that floating groups/elements/internal focussing provides a way to make a lens less scale sensitive. Not the opposite.

Though with many lenses not really a big problem, unit focussing lenses can't throw anything in the way of changing conjugated distances. They are what they are, and if that doesn't suit the changed conditions, too bad.
Lenses with floating elements, and the modern 'floating everything' IF lenses, adapt to changing circumstances the moment the change occurs.

If it were a contest, that way of focussing would win hands down over bellows or unit focussing lenses.
But there is another big "if": if that constantly changing optical design is used to indeed keep correction at a high level, and not just to make a lens cheaper to make (front cell focussing), of faster to (auto-)focus (less weight to shift fast when all you have to move is a couple of elements).