Somebody put up the building for one reason, the reason expired, and the concrete found a new job. Bigger capital plan, bigger conviction, bigger stock. Mark Cuban says today's AI data center buildout could leave much of it idle.PixeloneStocker / Getty ImagesWhy the AI data center boom rhymes with the fiber boomCuban has an unusual claim on this particular argument, because he was on the winning side of the last one. Then compression and optics improved faster than traffic did, and the bandwidth problem quietly stopped being a problem. Global data center electricity consumption is set to more than double to around 945 terawatt hours by 2030, slightly more than Japan's total consumption today, according to the International Energy Agency.