Thanks. Yes, I looked at AvaloniaUI, Uno, Xwt, and MAUI before finally deciding on AvaloniaUI. It's not been entirely frictionless, there are some glaring omissions, the documentation is not great and the learning threshold if you're not really good with WPF is pretty high. Still, it does work, and I have the app running on Windows, Linux and macOS with very, very little platform specific code.