I have experience across a heap of stacks... Cocoa, Cocoa Touch, Android, Win32/WinForms/WPF, Web, Xamarin Forms etc... I love UWP. It was pretty ordinary in the first few releases but it has matured well, has great documentation and the UI framework is developed in the open on GitHub.
I am by no means suggesting you could write something like Autocad or Photoshop in UWP; perhaps you could with a rethink of the UI. But UWP is an excellent choice for probably 70-90% of desktop applications, including enterprise LOB that are just forms over data or integrating with an online service of some kind.
If you're drawing your own conclusions based on what you read from others writing (who are likely doing the same) - actually try the framework, you might be pleasantly surprised.
Finally, I think Thurrott has lost the plot. He has been waging this war against UWP for many years now - to the point of a crusade - I just ignore any statement he makes on this.