On a Thursday morning in Taipei, sirens marked more than a routine civil defense drill — for the first time, Taiwan deliberately throttled its own internet to show its people what it might feel like to lose the digital threads connecting them to the world. Across 14 cities, as video calls froze and mobile payments failed, the island confronted a vulnerability that is neither hypothetical nor distant: its undersea cables have already been cut, its digital lifeline already tested by what officials call a 'grey zone' strategy from across the strait. In preparing for disruption, Taiwan is doing wh