React Native is for JavaScript developers. Native development is for hard core native developer, totally separate audience.
One of the reasons I like React Native a lot is because it makes it so easy to drop back to native code when I need to.
They will have a hard time if we become extinct.
Expo includes a `GLView` component that provides a WebGL-like API to OpenGL ES. Things like three.js run on it directly! But CPU-side JavaScript becomes a bottleneck (the shaders themselves run at normal speeds).