Great read.

This kind of reminds me of auto manufacturing. It's almost unintuitive how difficult, expensive & error prone paneling is. Also painting. Stamping out panels, painting and installing them is a very hard job to do with robotics. Most of the space, treasure and expertise invested into an auto factory is panel related. The "possible, but perpetually difficult" space can be a deep valley for robotics, it seems.

...And bricklaying, while conspicuous and important, is still just one job in construction.