The moment an enterprise adopts AWS Organizations, the operational time awareness of engineers changes. Until yesterday, "deploying a CloudFormation Stack to one account takes 5 minutes," but today becomes "I need to deploy the same security baseline to 200 member accounts, which takes 1700 minutes (28 hours) via console." Within those 28 hours, someone mispells an IAM Role name in one account, someone else deploys to ap-northeast-1 instead of ap-northeast-2, and someone forgets the last 50 accounts. Drift begins the moment people start repeating the same work. StackSets was built precisely to reduce those 28 hours to a single command.