The Architecture is Done. Now What Does That Mean for Your App?

React Native 0.83 – 0.84 · For Advanced Engineers · April 2026 The New Architecture is no longer opt-in, experimental, or a migration checkbox. It is the only architecture. The bridge is gone, the legacy renderer is gone, and the technical debt React Native has carried since 2015 is officially retired. Here's what that means in real production code. 1. The Bridge is Dead. Long Live JSI. For years, every React Native app shipped with an invisible bottleneck: the Bridge. Whenever JavaScript needed to talk to native code — triggering a gesture, mounting a view, calling a native module — data had to be serialized into JSON, thrown across a message queue to the native thread, deserialized on the other side, and the result sent back the same way. This round trip was asynchronous by design, and on a cheap Android device under load, it showed. JSI (JavaScript Interface) replaces that entirely. Instead of message passing, JavaScript now holds direct C++ references to native objects. There is no