I don't know any .net, and have never heard of this until now. Only stories with comments on HN are from eight years ago. Although I liked the screenshots on the linked site, it doesn't seem to have much buzz around it.

And unfortunately, the only stench I can't stand more than Google's is Microsoft's.

I do not follow buzz. I am an engineer by education and attitude and always try to investigate my options based on my needs and requirements. I use buzz only to drive me trough my investigations. In my case I had a desktop application that had to run on Windows and MacOs and needed support for Rich text format and rendering of custom graphs.

Following buzz I started to do a prototype with Flutter and stopped after a few days as I found out that most of the open source controls I was using had bugs on Windows Desktop. Then I moved to MAUI and discovered that in order to have some decent Rich Text support my only option was Blazor Hybdrid. Nedless to say I found bugs that prevented my prototype to work correctly. Then I moved to UNO and found that it doesn't have full Rich text format support. I was able to find some .NET open source libraries for doing text layout on Skia and with that I was able to find a partial solution that was however pretty complicated. Out of curiosity I investigated Avalonia and found that everything that I needed had full support. Being fluent in WFP I built the prototype in 3 days and I never looked back.

Your experience might vary depending on your fluency of WFP but I found that, considering Windows Desktop as a target platform, Flutter and MAUI are absolutely the worst options. In my opinion Uno is better than Avalonia when considering web application support but Avalonia has more coverage of the WPF api with respect to what Uno does for WinUi. And for sure marketing is the worst part of Avalonia while it is the BEST for MAUI and Flutter.

I use buzz merely as a proxy for community size, support, etc. Will have to try them out as you said to really know.