This is only half of it. There is a limit of how strong an ox can be, and, at some point (on the way to the Cray 3) Seymour hit it. That limit is pretty close to how strong a chicken can be, and we just got to breed chicken that are as strong as Seynmour's best oxen - which got us to a problem: the only way forward was with lots of ox-sized supechicken.
Someone should make that imagery into an educational video.