Every company runs React Native differently. Some rewrote an application from scratch, others integrated it in a brownfield scenario. Some tried other cross-platform solutions first and migrated to React Native, or vice versa. In this panel we bring together engineering leaders from companies running React Native at scale: millions of users, complex use cases, and real-world constraints. We'll dive into the decisions that actually mattered when shipping in production. How did React Native land in the organization in the first place? What did the first twelve months look like? What did they migrate to, or from, and why? And what would each team do differently today? This is the panel where the polished conference talks meet the production trade-offs nobody blogs about.