Nukes have pretty much ensured via MAD that there is no future "full scale direct conflict" between major powers. No matter how narcissistic some despot might

Nukes have pretty much ensured via MAD that there is no future "full scale direct conflict" between major powers. No matter how narcissistic some despot might be, their overwhelming self-interest still realizes there's not much power held over an empty parking lot or when vaporized into the side of a building. It's proxy wars from here on out. Given that, you can't think of a single scenario where having multiple floating runways would possibly benefit wartime?