Has nothing to do with mono. Mono effectively died when Xamarin got acquihired by Microsoft. They shifted focus to providing OSX and Windows only tools for deve

Has nothing to do with mono. Mono effectively died when Xamarin got acquihired by Microsoft. They shifted focus to providing OSX and Windows only tools for developing mobile apps with .NET, and mono development stalled, but parts got incorporated into dotnet directly. Microsoft have been much more friendly to open source in recent years. dotnet core is now supported and up to date on Linux. You can develop on Linux with VSCode (Visual Studio is still Windows only) or JetBrains Rider. You can consider dotnet core to be uncoupled from Windows. There are still parts of the .net frameworks which are coupled to windows, but they can be avoided with libraries like Avalonia.