I don't think we're ever going to go back to that. Those UIs were pretty static, i.e. you only created the "initial state" in the UI designer, and then modified it during the application run-time (sometimes even creating new widgets in code), or attached some kind of data-binding models to it.
With the popularity of things like React, you now have a powerful way to express how the UI looks in every state, not just the initial one.
