Right, I have no actual citation on Anders or other C# team members regarding their position on generics. Just personal conversion. Perhaps it's way off base. Yet, the lack of lambdas, inference, and the reluctant implementation in C# 3 (only the minimum for LINQ) suggests that was not the style they were looking for. Same for the handling of async in C# - instead of a general mechanism, it's another hardcoded intrinsic. More evidence: TypeScript also looks lackluster, despite being a big step up from JS.

I've no real clue why F# was productized, but I'd like to think it was because MS realized it has to stay competitive. F# is probably the most advanced language with that level of tooling, support, libraries, etc. I know F# is the only reason I continue to target the CLR. At the same time, MS's F# support certainly feels like it's just lip service, even while their flagship language lacks basics like a REPL. (I know, Roslyn will cure all.) I've yet to see any marketing suggesting F# would be a better choice for many projects; only esoteric sciencey and maths usages see suggested.

What'd really be forward would be for MS to support Rust or a project like that. (I believe they hired the guy behind BitC but I don't think it was for language design.)