It'll start with how Web and Mobile are different, the different thinking, ecosystem, and languages. Pitfalls and good points of “write once run anywhere”. Based on self-experience going that way, I'll explain the problems are starting when we add some integrations to our RN app (Firebase, handling envs, AsyncStorage), external libraries in general requiring coding with native code (Swift/Java). Interesting might be experience about the same app might have different behaviour when simulating/signing with Expo/EAS and Xcode/Android Studio. I'll also cover what Expo is, compare the ecosystems of Web and FE, and how different its to deploy to production.