Oscar Franco, a freelance system engineer and creator of popular React Native libraries, dives deep into React Native's new architecture. He explains the transition from the traditional bridge to the groundbreaking JSI and Fabric components. Oscar outlines the differences between Turbo Modules, Expo Modules, and Nitro Modules, highlighting performance benefits and challenges in migrating existing applications. He also shares insights on utilizing Rust for better tooling and memory safety, along with his fastest SQLite library, OP-SQLite, enhancing performance in mobile applications.