90 degree angles are practical for avoiding wasted space
¤%%link;;{½3;we understand them easily, and their composition easily
¤%%link;;{½3;stacking works because the plane of the qubes are perpendicular to gravity
¤%%link;;{½3;.. everything that stands perpendicular on the earths surface
¤%%link;;{½3;e.g. a saw can cut a line, and you just make 4 cuts
¤%%link;;{½3;because efficiency often wins over other priorities
¤%%link;;{½3;we are a race that makes tools and objects that compose and scale
¤%%link;;{½3;