Today, AWS CloudFormation StackSets increased the default for three service quotas: number of stack instances per stack set, number of stack sets per management account, and number of concurrent stack instance operations in a single AWS Region per management account. You can now (1) deploy up to 100,000 stack instances per stack set (previously 2,000), (2) create up to 1,000 stack sets in your management account (previously 100), and (3) run up to 10,000 concurrent stack instance operations in a single Region per management account (previously 3,500). See AWS CloudFormation quotas for the latest service quotas.