How do you know if your migration is actually succeeding? You must measure System Adoption Coverage continuously.
Leading teams use automated scanning scripts (such as GitHub Primer's component telemetry or custom Babel AST scanners):
$$\text{Adoption Coverage} = \frac{\text{Imports from } @system/components}{\text{Total Component Instances in Codebase}} \times 100$$
Publishing an internal monthly dashboard showing adoption progress keeps squads motivated and transparent.
Level 5 · Auditing & Multi-Brand Theming