[maxxxxx]

There is a little more to it than XAML. Skills wise it's not too bad but I have looked into porting some WPF apps to WinRT a while ago and those frameworks looked very differently under the hood despite some superficial similarity. I still don't understand why they need to create all this framework churn. WPF could have been extended to what UWP is now in my opinion.

[Aleman360]

XAML was reimplemented in C++ and now renders with DirectComposition instead of Milcore. It's much faster now and far more capable.

You can also now use it with both native C++ and C# thanks to WinRT.