I have started using Avalonia, and even though I am still learning, I am very satisfied with it. There are growing pains obviously, but as you said, I have no confidence in Microsoft UI frameworks.
(Disclaimer: I haven’t used MonoDevelop to know its quality, I’m just tempted by the idea of a free cross-platform .NET IDE. Microsoft took MonoDevelop, forked it into VS for Mac, left the former stagnate, and now is killing its closed-source descendant.)
GIMP - GIMP 2.99.18 Released: The Last Development Preview Before 3.0! (www.gimp.org)
How .NET 8.0 boosted AIS.NET performance by 27% (endjin.com)
.NET Conf 2023 - Presentations (www.youtube.com)
Introducing Hybrid XPF: Bridging Avalonia and WPF Controls (avaloniaui.net)
The convenience of System.IO - .NET Blog (devblogs.microsoft.com)
The convenience of System.Text.Json - .NET Blog (devblogs.microsoft.com)
Debugging Enhancements in .NET 8 - .NET Blog (devblogs.microsoft.com)
Performance Improvements in .NET 8 - .NET Blog (devblogs.microsoft.com)
Announcing .NET 8 RC1 - .NET Blog (devblogs.microsoft.com)
Demystifying Retrieval Augmented Generation with .NET - .NET Blog (devblogs.microsoft.com)
Wayland Support for IntelliJ-based IDEs | The JetBrains Platform Blog (blog.jetbrains.com)
Visual Studio for Mac Retirement Announcement - Visual Studio Blog (devblogs.microsoft.com)
Announcing the New Foundational C# Certification with freeCodeCamp - .NET Blog (devblogs.microsoft.com)
Announcement of LibreOffice 7.6 Community - The Document Foundation Blog (blog.documentfoundation.org)
Avalonia XPF pricing is now publicly available: starting from €4,999 per app, per platform, perpetual license (avaloniaui.net)
This is not to be confused with the Avalonia UI framework which remains free and open source....
New C# 12 preview features - .NET Blog (devblogs.microsoft.com)
GIMP - GIMP 2.99.16 Released: Wilber Week 2023 edition! (www.gimp.org)
Tangentially related to the Linux ecosystem, since it’s a major software that’s used by many of the platform’s users
Avalonia v11 (dev.to)