Redux popularized the idea of a single global store — one tree of state, one set of reducers, one source of truth. It works well with one team and ten slices. It breaks down with five teams and fifty. The global store isn't just where your state lives — it's a shared dependency that every feature, every team, and every pull request must coordinate around. SDuX Vault™ eliminates that coordination cost by scoping state to independent FeatureCells™.
The Single Store Assumption
Redux centralizes state through a global store and reducer tree. Every feature adds slices to the same root object. Every selector projects from the same tree. Every action broadcasts to every reducer.
At small scale, this is manageable. One developer understands the full tree. Renames are safe because the blast radius is visible. Selectors compose predictably because nobody else is changing the shape under you.
At team scale, the single store becomes a shared mutable dependency — not in the Redux sense of mutable state, but in the organizational sense. Every team's code touches the same tree. Every refactor requires cross-team awareness. Every selector is one shape change away from a silent regression.
