A little off-topic. I like Go but haven't used it in a while.

While offline I remember a couple go command operations were surprisingly giving me proxy.golang.org or network unavailable errors. In the sense that it had no reason to touch the network. Can you refresh my memory what they were? Or if they are still present? I can't for the life of me find or remember the answer.

It was what made me discover some of the things the article mentions, like the package index.