What is the difference between Redux and MobX?
Answer
Redux and MobX take fundamentally different approaches to state management. Redux: explicit, unidirectional. Actions are explicitly dispatched. Reducers are pure functions producing new state. State updates are tracked via action history — excellent for debugging with DevTools. Verbose but predictable. Best for complex apps requiring deep debugging, time-travel, or strict data flow. MobX: implicit, reactive. State mutations are automatically detected and propagate to all observers. More OOP-friendly. Less boilerplate — no actions/reducers required for simple mutations. Harder to debug (implicit updates, no action history). Best for apps where developer productivity and minimal boilerplate are priorities. Mental model: Redux = functional, immutable, explicit. MobX = OOP, mutable observables, implicit reactivity. Team considerations: Redux has a larger community and more tooling. MobX is more familiar to developers from Angular/Vue OOP backgrounds. Most experienced React teams choose Redux (with RTK) or Zustand over MobX for new projects due to Redux's superior debugging story.