With one giant caveat imho — I have a root account, an admin account, a common account (load balancer, database) and then customer-specific accounts. Was working great, using Terraform for consistency, sharing VPC where made sense, etc… until I had an issue and realized that my paid support plan only covered the root account. From what I understand you have to get a separate support plan, with a paid minimum ($100 per for business plan), for each account if you’re gonna need tech support, and you can’t pool until you’re in the $15K+ monthly spend: “AWS Support fees are calculated on a per-account basis for Business and Developer Support plans. For Enterprise Support, you are billed based on the aggregate monthly AWS charges for all your account IDs subscribed to Enterprise Support.”

Really soured me on the setup, tbh.