Also don’t forget about survivorship bias. We don’t know how many percent of their buildings are still standing. Probably only the really really good build ones. Also never forget, any idiot can build a bridge that stands. It takes an engineer to built one that barely stands. And that is often what we are doing today. Making our stuff “good enough” as otherwise it wouldn’t be economic feasible in the short or midterm. I am still curious how good it would be if we would instead aim for the long-term though…