Google is making its proprietary TPUs (Ironwood) available to Meta, directly challenging Nvidia’s 90% dominance. The massive cost of AI compute is forcing tech giants to turn from Nvidia's biggest customers into its fiercest competitors. This strategic shift will wipe out $150B in market value and signals the end of a near-unbreakable monopoly. Can Nvidia's software moat (CUDA) hold up against the combined might of hyperscalers?