Because there are many, many angry people with existing codebases that they would break, and you would get something like the python 2 to 3 saga. iOS already p

Because there are many, many angry people with existing codebases that they would break, and you would get something like the python 2 to 3 saga. iOS already pushes way too many breaking changes with every major swift release. A real break would be too much. They do it incrementally via things like jetpack compose or swift UI.