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Missing, extremely new, or very obvious to obtain.

A reference to Episode 42 of anime series Gundam 0079, when a mechanic explained to pilot Char Aznable why the prototype Zeong was missing the legs: "They're just for show anyway. The brass never understands that." Technically it's true, because most gundam fights happened in space where they fly with the thrusters. Whether the Engine of Creation can fly or not is another matter. - Credit: Necrosyrtes