> you will have to use the design guidelines and native elements of every platform
This is exactly what react native does. It uses native components (there is a cross-platform abstraction, or you can use the platform-specific components directly) and you implement the design guidelines in platform specific files: https://reactnative.dev/docs/platform-specific-code
> but not the views themselves
Without the views, why would it be in react native? React is for building the UI...
> Having one mega-app seems more of a complication to me.
single codebase != mega-app. There is no "mega-app" as the compiler only uses the code for the target platform. You can even target specific architectures and/or devices as it uses the native sdks behind the scenes.
I think we're battling on the same side, I was generally speaking about subject of the OP post, where people make one web mega-app for all platforms with the same views, achieving this kind of single-codebase ;)
This is exactly what react native does. It uses native components (there is a cross-platform abstraction, or you can use the platform-specific components directly) and you implement the design guidelines in platform specific files: https://reactnative.dev/docs/platform-specific-code
> but not the views themselves
Without the views, why would it be in react native? React is for building the UI...
> Having one mega-app seems more of a complication to me.
single codebase != mega-app. There is no "mega-app" as the compiler only uses the code for the target platform. You can even target specific architectures and/or devices as it uses the native sdks behind the scenes.