Well, because midrise buildings hit a horrible resonance with the frequency of earthquakes and are the type of building most at risk, and because those huge sky

Well, because midrise buildings hit a horrible resonance with the frequency of earthquakes and are the type of building most at risk, and because those huge skyscrapers have pendulum counterweights, wheels they roll on 100 ft in the ground, and it just costs way too much to use that tech in a smaller building.