> Other languages are not cross-platform or have immature/buggy cross platform support. How's ObjC on Windows? C# on Mac? They exist, but nobody uses them. Wha

> Other languages are not cross-platform or have immature/buggy cross platform support. How's ObjC on Windows? C# on Mac? They exist, but nobody uses them. What's wrong with C# on Mac? It's basically bindings to the native API via Xamarin.Mac. You can build a cross-platform app with Xamarin on iOS / Android / Mac, UWP on Windows, and Gtk# on Linux. Using something like MvvmCross will allow to share most of the business logic between platforms.