Is flexibility a particularly useful feature for lawyers? I've always kind of thought that flexibility was one of the shortcomings of paper in most situations involving writing, hence clipboards.
Flexibility is a feature. What requires clipboards is a lack of strength. Flexibility is what allows paper to bend and not break when you overcome its strength by flapping it around.
Flexibility ought to allow for lighter devices, as they won't need to be built as strongly to avoid breaking.