That said, I don't get the point of a wooden skyscraper. I'd guess it's earthquake resistant, and it's not actual natural wood but a mix of synthetic materials and wood.
Wood is an overall superior construction material if you can use it, and I think you're misunderstanding the pressure treatment process. It's normal wood placed in a vacuum chamber so preservatives can seep into the lumber.
Use screws, not nails. Nail guns are convenient but they are for framing (playing to the strengths of nails’ awesome sheer strength) not layering (screws have far better tensile strength, poorer sheer strength). Add a zigzag of construction adhesive (insanely cheap stuff) to the joists before installing the subfloor. Leave 1/8th to 1/4th of an inch gap between each plywood sheet to leave room for swelling (in the Midwest that’s in the humid summers, on the coast it might be the other way around). Done.
Screws and nails are fundamentally different and should never be considered interchangeable. The cost difference is minimal given the trade offs involved, but contractors are apt to choose nails any time they can get away with it.