GitHub is great because you get to use git. I don't think that you can entirely separate them from each other, or craft an argument for the advantages of GitHub without somehow mentioning git. The vulnerability in GitHub clearly matters. It was a potentially explosive issue, but GitHub issued a prompt and appropriate mea culpa, while resolving the problem. Also, it stirred the pot in the Rails community, with many coming up with safeguards against the potential mass assignment vulnerability. Although I disagree with his downplaying of the problem, I certainly don't have plans of going anywhere else, which I think is the spirit of what the author was trying to convey.