Upgraded my test system using an image built from UUP using the cleanup option and the upgrade failed. I made a new image without using the cleanup option and the upgrade worked without issue. The failed upgrade was very strange. $Windows.~WS ended up with a broken yet mounted image that I needed to unmount manually.
Bing has been using rounded corners for some time now. Why is it taking so long for Microsoft to add them to Windows 10 ?
Testing is in progress and we need to wait for the release of WinUI 3.0. The app is currently in preview 2 stage, but build 20197 already mentions some elements that use new WinUI.