Bloc: the boring architecture that scales

Trends rotate; production teams still ship with Bloc because it is predictable. UI sends events; blocs emit states; widgets rebuild from state.

Why it scales

1. Debuggable event logs.
2. Test blocs without pumping the entire app.
3. Clear ownership boundaries between features.

Modern usage tips

• Prefer flutter_bloc builders/selectors over rebuilding whole pages.
• Keep blocs free of BuildContext navigation side effects.
• Pair with a repository layer — bloc is not your data layer.

Pitfalls

God-blocs that hold the whole app. Split by feature and lifecycle. Also do not map 1:1 every field change into a bloc event.

If your team needs a default architecture in 2026, Bloc is still a defensible answer.