Microsoft is quietly firing its own AI suppliers. Tens of thousands of weekly prompts inside Excel and Outlook that used to hit OpenAI and Anthropic models now run on Microsoft's in-house MAI family instead. No announcement. Just a swap. The playbook is old and brutal: buy the capability, learn the capability, replace the capability. If your startup's product is a thin layer on someone else's platform, you're not a partner — you're a roadmap item. We track these shifts daily at www.contentbuffer.com What's the one thing your product does that a platform giant could NOT copy in a year? #AI #Microsoft #OpenAI #Anthropic #SaaS #Startups #TechStrategy #ContentBuffer