Microsoft's $150 billion AI bet is flopping as workers reject Copilot, bad news for Microsoft and the broader AI investment boom.

• Only 3.3% of Microsoft 365 users pay for Copilot, and just a third of paid users actually open it regularly.
• Microsoft quietly updated its terms to call Copilot "for entertainment purposes only," undermining trust for serious work.
• Customer satisfaction scores crashed from -3.5 to -24.1 in two months as users complain the AI produces robotic text and unreliable code.
• Microsoft is spending $37.5 billion a quarter on data centers and GPUs, straining power grids and even restarting the Three Mile Island nuclear plant.
• Microsoft is now mixing Anthropic's Claude into Copilot because its OpenAI-based system fails accuracy tests, a quiet admission the product isn't good enough alone.

Outlook: Expect pressure on Microsoft's stock and a rethink of the OpenAI partnership as the AI spending boom collides with weak real-world adoption.