Also Microsoft doesn't have anywhere near enough resources to rebuild three decades of Windows software and they have made it a strong point that they don't wan

Also Microsoft doesn't have anywhere near enough resources to rebuild three decades of Windows software and they have made it a strong point that they don't want to break compatibility with applications built 20/30 years ago. Even changing the sizes of controls by a single pixel to old controls can sometimes cause bugs and compatibility nightmares Microsoft can't test for nor easily fix.