Khi nào nên dùng atomic state management (Jotai) thay vì Redux/Zustand?

Jotai phù hợp cho state có cấu trúc graph với nhiều derived values; Zustand/Redux phù hợp khi cần single source of truth serialize được và time-travel debug.

Decision matrix — dùng Atomic (Jotai) khi:

1. State có cấu trúc graph, nhiều derived values từ base atoms (ví dụ: cart total, filtered lists, computed stats đều derive từ cùng nguồn);
2. Cần fine-grained updates — 1000 items list, mỗi item là 1 atom, chỉ item thay đổi mới re-render;
3. State không nhất thiết phải centralized — features khác nhau sở hữu atoms riêng;
4. Cần co-locate state với components sử dụng nó

Dùng Redux/Zustand khi: cần single source of truth có thể serialize/rehydrate, cần time-travel debugging, team quen với flux pattern, cần middleware pipeline (logging, side effects).

Real use cases Atomic: collaborative editor (mỗi doc element là atom), form builder (mỗi field là atom), dashboard với nhiều widgets độc lập.

Lưu ý: atomic state khó debug hơn khi dependencies phức tạp — không có Redux DevTools tương đương để xem toàn bộ state graph.

Jotai suits state with a graph structure and many derived values; Zustand/Redux suits when you need serializable single source of truth and time-travel debugging.

Decision matrix — use Atomic (Jotai) when:

1. State has a graph structure with many derived values from base atoms (e.g., cart total, filtered lists, computed stats all deriving from the same source);
2. Fine-grained updates are needed — a list of 1,000 items where each item is its own atom, so only the changed item re-renders;
3. State doesn't need to be centralized — different features own their own atoms;
4. You want to co-locate state with the components that use it

Use Redux/Zustand when: you need a serializable/rehydratable single source of truth, time-travel debugging, the team is comfortable with Flux patterns, or you need a middleware pipeline (logging, side effects).

Real atomic use cases: collaborative editors (each document element is an atom), form builders (each field is an atom), dashboards with many independent widgets.

Pitfall: atomic state is harder to debug when dependencies are complex — there's no Redux DevTools equivalent to visualize the entire state graph.