What is the default limit of EC2 instances you can launch in a single region?

The default limit of EC2 instances that you can launch in a single region is indeed variable and starts at 20. This limit is designed to help manage resources and ensure fair usage of AWS infrastructure among users. Each instance type has specific limits that may vary based on factors such as demand, available capacity, and account history.

When users need more instances than the default limit allows, they have the option to request an increase through the AWS Service Quotas console. This flexibility allows administrators and developers to tailor resource usage according to their specific needs while maintaining system reliability and performance across the platform.

The nature of this limit—being dependent on the instance type and starting at a specific number—reflects the dynamic structure of AWS's offerings, ensuring that users can scale while also considering the overall resource ecosystem within each region.