Besides, "jumpin jeezus on a dinosaur is it hot outside..."
The slogan "form follows function" is an idiom, ultimately fairly meaningless. Another turn of phrase utilized to confound the public into a certain way of thinking. In reality, the only thing that matters from a public perspective in how well the city operates and in terms of increased quality of life and public spaces is actually, "Building Form Follows Road Function."
Here, I'm utilizing road as a catchall. Feel free to substitute whatever the dominant form of transportation is in the place of "road." The equation is always still true, but whether it is positive or negative is determined by the quality and design of the underlying transportation framework.
AND THAT DOESN'T MEAN FUNCTIONAL CLASSIFICATION "A".