Then you missed out on an intelligent and frankly important critique. He managed to put in words what I have been thinking for a while. I was skeptical after the first two sentences too...
I disagree on both counts. Actually, I find the assertions in that post callous and destructive. This cathedral that the poster is referring to never existed. Open source has never been healthier, and Github is a very big part of the reason why.
I would have liked to see some examples in such a broad statement. I am struggling to think of an O/S project I used pre-github that fits the bill.