Stage 04 fails silently when insights are gathered and shelved. Give the loop an operating cadence: a monthly education-telemetry review with named owners from curriculum, product, and marketing, each leaving with items.
The measure of the stage is not what was learned; it is what changed — and the changelog of your curriculum is the audit trail.
The shelf, and vanity telemetry
Insights decked, presented, and never routed to an owner are theater. And a dashboard reporting only enrollments and completions has no failure metrics on it — which makes it decoration.