What's interesting is that C# 5 release (which made the breaking change) was back in 2012, and both the change and the reasons for it were very widely discussed at the time. This is right around the time when Go shipped its 1.0, and it's kinda surprising that they either didn't look closely at "near-peer" languages, or if they did, couldn't see how this problem was fully applicable to their PL design, as well.

(Note that C# at least had the excuse of not having closures in the first version, which makes scoping of "foreach" moot - the problem only showed up in C# 2.0. But Go had lambdas from the get-go, so this interaction between loops and closures was always there.)

Same here, DevDiv is now polyglot focused, so you will see regular comments from .NET folks on other languages as well (mainly Java and Go). David Fowler tends to tweet every now and then about them as well.

Yeah, it's often a joy to read these posts and the perspectives on it; this is how programming language development should be done.