Sometimes I think IT industry is moving slow, because it's so much harder to multiply the efforts with more human power. IT is so much quality over quantity that effects like this would not happen easily.
Although there is no mention of the planning involved in the construction of the building, I think the result is astonishing.
Considering this is prefabricated module assembly it is exactly like today's development work.
Even more so as people have created frameworks and libraries that you can use freely to compose your application in much less time than if you had to do it all over again.
Some of these frameworks and libraries simplify the process so much that you CAN throw more human power at it and still get good results.
I'm so not joking. 100 developers might equal = 10 experienced developers these days. You can't just "put more force into the project and make it for 10 days", because actually the people that you want to hire might be not that easy to find.
A building is == at least in some dimensions == much simpler than contemporary IT. Guilding systems are much more amenable to static analysis than a flight of networked computers and the rate of dynamic change is on the order of tens of seconds even in the worst cases [barring explosion or brittle failure].
With these prefab buildings, if you have built one, you have built them all. With software that works quite differently. Unless of course you consider "copying" to be equal to "building", in which case, software is moving even faster!
Although there is no mention of the planning involved in the construction of the building, I think the result is astonishing.