"Assuming everyone else have exactly same design choice and architecture as yourself, making suggestion on this ground and calling other people crazy because they can't implement what you suggest them to do" is not trying to be helpful.
Well, or maybe I'm just frustrated reading his repeated "please keep a copy 'locally' somewhere and run git fetch". Just like how I'm frustrated arguing with him on HN about whether sending patch to mail list is better than GitHub pull request.
Don't get me wrong, I understand this is a real Google-scale system v.s. individual code hosting website issue, I just don't see how his "please stop being Google and instead try my works-fine-on-one-box solution" take is helpful.