Instagram's algorithm knows far less about you than you think, revealing itself through illegible mathematical vectors rather than semantic understanding—until now. Head of Instagram Adam Mosseri discusses how AI is reshaping product teams, why AI-generated content may actually help creators thrive, and the real trade-offs behind every major platform decision. Product teams at Meta are shrinking from 13+ specialists to 4-6 generalist engineers plus a 'product staff' role blending PM, design, data science, and research capabilities.