Putting walls up is incredibly cheap, that's like the least interesting thing to automate. Plus it'd be hard (read: expensive) to move them from the factory to

Putting walls up is incredibly cheap, that's like the least interesting thing to automate. Plus it'd be hard (read: expensive) to move them from the factory to the site, and it'd be hard to get them into place when they're on site. For things that are actually hard to build or easy to move, like cabinets or roof trusses, we're already building them in factories