Putting scare quotes around what I said, calling what I said "ridiculous", and seems to have taken critique of the Go language personally by saying that the Go language designers better than most language designers.

So this is why I found the reply neither calm nor courteous. As for reasoned, I don't see any reasoning it it, just conclusions.

I don't even see any sign of a refutation of my point, which isn't so much about if Go is good or not, but about the needless reinventing and ignoring other work, and as a result running into problems that would have been predictable, had they been taken into account.

To me it summarizes as "they're smart, you're dumb".

If this is the type of replies this person would write, then that's not productive.