Prop drilling vs Context — couriers vs the broadcast tower

Feel the user prop march through components that never use it, then watch one Provider make the chain disappear.

THE BIG IDEA

The user lives in App. A badge four levels down needs it. Act 1 does what every beginner does — pass it through everyone in between — and makes you feel exactly why that hurts. Act 2 raises a Context Provider and the middle components stop carrying parcels that were never theirs. The honest fine print about re-renders is included, because context solves WIRING, not performance.