DEN did because it physically moved locations. If you have an airport that is literally the exact same footprint (property wise, not terminal), then its silly to say its a new airport. Its got the same address. Who cares if the old building is demolished. If the old terminal was going to stay, people wouldnt say its a new airport, just a new terminal. Yet somehow the demolishing of the old terminal at the same time somehow makes the whole airport new...doesnt make sense. They are not mutually exclusive.