Most AWS waste isn't a bad architecture decision. It's a charge that nobody decided on: a default, a leftover, a setting nobody revisited. I work across 170+ AWS accounts, and these seven show up in almost every one of them. Each section has what it is, why it happens, how to find it (read-only commands) and the fix. Prices are us-east-1 list prices; check your region. 1. Unattached EBS volumes What: an EC2 instance is terminated, but its data volume had DeleteOnTermination...