And no self-respecting developer would ever use Mono on nix anyway because the nix tools run circles around anything .NET/Mono.
Moreover, for maximum performance, mono provides facilities for users to embed native code into the runtime, much faster than Pinvoke.
From what I gather, HN isn't so much about being part of an "in-crowd" where you "just know" the way things are. You need to be willing to explain your arguments, otherwise you're just a snob.