You completely missed the fact that this is built using Avalonia, which means that you can run this on desktop (win, linux, osx), mobile (android or ios) AND browser (using wasm) with almost the same codebase.
check https://github.com/BAndysc/AvaloniaVisualBasic6, and feel free to try the desktop ones.
Watch Scott Hanselman helping out a guy setting up a Windows/WSL/VsCode development environment.
During the process they go through a lot of subtle things related to Windows, terminal, WSL and vscode. Quite impressing.
This looks like the same shift that has been happening in Microsoft for the past few years. They tried phone convergence (continuum, the one core across devices), but the real focus is now cloud and services. Also, the fact that Microsoft ships Ubuntu as the Linux on Windows subsystem definitely shows an alignment on the companies' plans.
that was my same feeling. I'm a C# developer, and even though I consider myself a decent dev, I never thought of C# as a toy language. I guess I'm not that good.