Who owns the control plane? Google Cloud Next 2026 and the real contest in agentic AI

I recently spent some time reflecting on the announcements from Google Cloud Next 2026, as well as a series of vendor briefings and a handful of enterprise architecture engagements, where the same question kept coming up across different venues: once an organization has agents, who governs them? For two years, the enterprise AI conversation has been a conversation about models — whose is largest, whose is cheapest, whose context window stretches furthest. Virtually no one was talking about data