This old house (PBS) is doing a show as we speak about Connor Homes.
They prefab wall panels in a factory and pretty much cut all of the
discrete lumber in a computer aided factory. All the "assembler" does
is stand them up and nail them together.
So much for those guys who spent decades developing their skill.
If you can put an Ikea book case together, you can build a house ...
and it ends up being faster and cheaper. These are not "boxes", they
are wall panels so you can build just about anything.