I saw 0.01 version of one in San Mateo, CA about 20 years ago. The building was built from the top down. Each floor was built on the ground, cast concrete, I b

I saw 0.01 version of one in San Mateo, CA about 20 years ago. The building was built from the top down. Each floor was built on the ground, cast concrete, I believe, and hoisted into place underneath the one on top. It probably didnt have any real advantages, because I havent seen it done again. One would thing that simple, but well designed and constructed, housing would dominate, but it hasnt happened. Construction codes are one thing, but I think the real reason is that nothing can compete with fine contros and flexibility of humans when it comes to building large structures.