if it's all metal,
there are far more flexibilities to the designs
in terms of height, size, and unification.
so the entire city may look like this:
https://www.artstation.com/artwork/d8WqRx
flying cars may be organized like this in height.
advantages?
generally against radiation and internal transport.
convenience, accommodating much population?
but that's just my thought,
any designs can be used as a building.
was aiming for
the mandalorian series, there is a very dark city-
red carpet, in some episode.
seemingly accomodating flying vehicles.
that link, artstation is a better representation of that.
but too mathematical.
if beauty and convenience, practicality can all be
put together.