As I was sitting in a plane for twenty minutes, taxiing from one end of this monstrosity to the other, I thought of this community! Inside the airport is even worse. It’s just this GIANT, sprawling mall+airport thing, with flat parking deserts in between terminals that are so far apart you have to take a monorail to them. Absolutely wild.
https://en.m.wikipedia.org/wiki/Dallas_Fort_Worth_International_Airport
You do realize that DFW has nearly 2000 flights every day, and 200,000 customers, every single day, right?
You need 6 terminals at that point. The rest of that is just infrastructure, taxiways, and runways. And the runways are spaced at the minimum distance apart for FAA rules.
It’s a masterpiece of design, just from how big and complex it is.