I can tell you that in Roslyn it is a very important component of our optimization strategy. System.Collections.Immutable.ImmutableArray is an obvious example.

I can tell you that in Roslyn it is a very important component of our optimization strategy. System.Collections.Immutable.ImmutableArray is an obvious example. As an extremely high performance managed application that competes directly with native code, it seems to be quite a good proxy for similar applications, including Minecraft.