Are you arguing that we would have been just as slow in 1955 if "There were existing infrastructure or residents to deal with"?

The whole point of this article is that we should aspire to be better, faster, more relisilient to failures, less bureaucratic and efficient. My gut sense (subjective) is that we profoundly suck today at doing anything aspirational. But, nitpicking each of the examples as many comments here are doing, is IMO missing the point. I don't think Patrick is trying to be super objective here besides trying to be as accurate as possible with sources/number of days it took to build those projects. It is kind of silly to say "Oh, they didn't have X, Y and Z in 1955" because you cannot accurately judge what would have happened if X, Y and Z were actually the impediments in 1955. I used 1955 as an arbitrary year to illustrate the point.