A concise but important reminder that an AWS account is a security and resource boundary, not merely another login. Separating production, development, security, and log-archive workloads limits the blast radius of compromised credentials or configuration mistakes while also improving cost attribution. AWS Organizations, centralized identity, service control policies, and consolidated logging make this much easier to govern than a collection of independently managed accounts. A useful follow-up would be a practical “minimum viable landing zone” for small teams, since the main challenge is often knowing when and how to introduce a multi-account structure without creating unnecessary operational overhead.