A major Windows 11 UI redesign is coming, Microsoft is dumping legacy code for WinUI

Microsoft confirms Windows 11’s File Explorer Properties dialog is a real WinUI rebuild, and more legacy dialogs are moving to WinUI next. Microsoft says that their plan is to convert more Windows UI elements to WinUI3, while confirming that the new File Explorer Properties dialog was rebuilt from scratch in WinUI, and not just a fresh coat of paint. Windows 11 has felt inconsistent for a while now. Modern panels are right next to decades-old dialogs, RAM usage keeps creeping up in apps that are supposed to be native, and popular Windows apps keep turning into web wrappers because developers don’t trust Microsoft to stick with a UI framework.