Hi, I'm a Redux maintainer. A few notes here:
- It was never necessary to write `mapDispatchToProps` as a function. `connect` always supported an "object shorthand", where you passed in an object full of action creators, and we recommended that as the default: https://react-redux.js.org/using-react-redux/connect-mapdisp... . That said, yes, with hooks we just give you `const dispatch = useDispatch()` and let you use that as necessary.
- The split across multiple files was never _necessary_. Splitting code like `actions/todos.js`, `reducers/todos.js` , and `constants/todos.js` was _common_ (and admittedly shown in the docs), but Redux itself never cared about how you organized your code at the runtime level. The single-file "ducks pattern" ( https://github.com/erikras/ducks-modular-redux ) was proposed very early on and was always something users could do.
- Labeling "global reducer, serializable state, serializable actions" as "not bringing anything worthwhile" seems like a complete misunderstanding of Redux's design and purpose. Redux was created to give you a consistent data flow architecture, and the ability to make it easier to understand when, why, and how your state gets updated. Centralizing state and having consolidated reducer logic means you _always_ know "go look at the reducers" to see what state the app has, what actions _can_ occur in the app, and how the state gets updated for each action that can occur. Serializable state and actions enable the Redux DevTools, which show you the history of dispatched actions, the action and state contents for each dispatch, and the final resulting state after each dispatch. So, the design constraints are fully intentional to give you the benefits that make the app's behavior easier to understand.
Finally, note that Redux usage patterns changed dramatically in 2019, with the release of our official Redux Toolkit package and the React-Redux hooks API. RTK includes methods that simplify all the common Redux use cases: setting up a Redux store with good defaults, writing reducers with simpler immutable update logic (and getting all the action creators generated for free), patterns like async requests / reactive side effects / normalizing items by ID, and even our RTK Query data fetching layer for fully declarative data fetching and caching.
Redux is not the right choice for all apps, and there's a lot of other good alternative tools in the ecosystem. But Redux's design _is_ very intentional, those constraints were put in place to enable the desired benefits, and Redux usage today is much easier thanks to RTK.