Sullivan's description of the tall tower typology established a standard approach for designing mid- and high-rise buildings. However, his approach reduced the tower into a monotonous and potentially-infinite form per the conventional "stack," i.e. the layering of identical floor plans on top of one another with vertical circulation limited to just an elevator core. Such a formulaic approach to the design of the tall tower typology has prompted little innovation and the perpetuity of mundane office layouts, little communication across floors, and static spatial experiences.