Microsoft's falling ROIC understates how its AI spending is turning into durable value. Heavy capex, $30 billion in the March 2026 quarter, cut ROIC from about 23% to 21.5% and pushed cloud gross margin to the mid-60s. But Azure grew 40%, with AI adding 16 points, the AI business hit a $37 billion run rate, up 123%, and commercial remaining performance obligations reached $625 billion, up 110%. Copilot is early: about 4% of enterprises use it company-wide, yet paid seats top 20 million, up 250%. x.comÂ