If you build like this, you build only one thing. By definition, that thing is one of a kind. To put that in the language of tailors, it is bespoke: no standard parts, no commercial off-the-shelf products, no simple repetition of what was done last time. And that translates into slow and complex. Nuclear power plants, for one, are the products of a staggering number of bespoke parts and systems that must all work, and work together, for the plant as a whole to work.
