In practice, yeah, this is the fix in most systems because in a microservice context it would feel gross to have a slow consumer reach out and throttle a fast p

In practice, yeah, this is the fix in most systems because in a microservice context it would feel gross to have a slow consumer reach out and throttle a fast producer. It’s still important to understand though because autoscaling has its own back pressure that you run into eventually. Accounts may have quotas or regions might be out of a given instance type, or out of a type at your preference spot price.