@7f60fbe4 All for convenience, and the rule was convenience = planes. Set airports up differently and plane > train would be incredibly convenient. Travellers are often too tired, and surroundings too hectic to navigate complex situations. It's a very interesting topic that requires creative, fresh solutions.
Years ago I coined transformating distribution centres: build apartments (also for workers) on top, make them attractive, add commodities. Too expensive. Minds are not flexible yet.