Idk, but I think they burried themselves under a load of GUI frameworks.

Windows Forms is good, but limited. WPF is almost perfect, but Avalonia is like that + cross platform.

The other ms gui frameworks are a waste of time, skip those.

I think Microsoft stands behind MAUI.

But since they pivoted to cloud, web AI and they don't profit too much from people building desktop and mobile apps, I guess Microsoft won't invest much resources into MAUI or any GUI toolkit.

They probably are working on one all the time but they scrap it when starting a new framework…

Unclear why. But it is not uncommon for Microsoft to leave 'holes' in their offering soo that the partner network can fill them. Over 90% of Microsoft's revenue is partner-delivered. This often sparks great innovation outside of Microsoft walls.

Uno Platform promotes the use of .NET, so is therefore a tech-partner to Microsoft.

And with Hot Design (https://platform.uno/hot-design/) Microsoft's .NET Ecosystem becomes richer for a tool that no other developer ecosystem has. It is A RUNTIME VISUAL DESIGNER for .NET Apps. It turns the App you are developing into a Visual Design surface you can drag-and-drop components on, data bind,etc.