If you mean windows, it has been so many years since .NET has been able to run on many different platforms; and by now, most of the ecosystem supports majority of platforms too..

You get an amazing runtime with near native performance, access to value types, no type erasure, access to low-level operations when utmost performance is needed, very good cross platform and architecture SIMD support, three different great IDEs with two of them being cross-platform, AoT compilation that keeps getting better, WASM target with a good framework (Blazor), and so on.

Modern .NET is truly amazing and highly undervalued IMO.