Right, I'm referring to the fact that C# 3 added LINQ, but with the bare minimum of features for LINQ. Type inference, for example, is purely for anonymous types and the LINQ extension methods. They never went back to clean those up since V3, and it doesn't seem like they care.

Maybe this magical Roslyn rewrite is going to enable all sorts of amazing things, and then C# will rapidly catch up. But from the outside, it feels like C#'s good enough (hey, it's better than Java), and MS is content to keep it that way.