: Use Windows App SDK + WinUI 3 if targeting Windows 10/11 desktops; maintain UWP only if you need Xbox, HoloLens, or Store integration without full trust.
This was the runtime’s crowning achievement. UWP introduced a package model where apps were installed and uninstalled cleanly. No more registry keys left rotting in the system, no more "InstallShield Wizards" crashing halfway through. You clicked "Uninstall," and the app was gone. It was the iOS/App Store experience brought to Windows, and for the average user, it was a massive quality-of-life improvement. uwp runtime