We are only even seeing part of the stairs, really. XDwell the staircaisse doesn't even have raillings, they are mendatory in the code over here. I lost hope of Runey modifying the staircaisse to be legislation compliant with the staggering amount of renders already done in the lobby. Also I belive all staircaisse must be insulated from the rest of the floor with concreet walls and fireproof metal door. In case of fire on a floor so occupants can get out of the building even if the fire is on a lower floor. So we should not be able to see a staircaisse at all from the lobby but a big, unapealing metal door. Unless of course there is an emergency staircaisse besside the elevator. But then the floors arent isolated from one an other anymore, and fire would spread to fast to be code compliant.
Buildings are no fun, so many things to consider that would hamper creative freedom for architects. Good thing Runey isn't one. (to my knowlege) He can do whatever he wants.
Probably have some fire escapes somewhere too.