Ensuring that the EC2 AMIs being used are not outdated ensures that the deployments are secure and reliable. Ensuring that they are not older than 180 days old ensures that they meet security and reliability requirements.

Having a minimum retention period set for RDS database instances will enforce your backup strategy to follow the best practices as specified in the compliance regulations. Retaining point-in-time RDS snapshots for a longer period of time will allow you to handle more efficiently your data restoration process in the event of failure.