But users don't want to be UI designers. I could see a case for an AI that watches the user use the app for a few weeks and automatically designs a UI for them based on their needs. But in general, users don't want to have to do work on top of the work they already do. It's the same reason that despite DVDs having multiple angles for years, and 360° video being easily renderable, almost nobody uses these features. I don't want to direct the movie while I'm watching it!