stepfunction parallel state branches limit

Hi, StepFunctions have by default a quota a 10'000 registered activities at any given moment. See https://docs.aws.amazon.com/step-functions/latest/dg/limits-overview.html

As per https://docs.aws.amazon.com/step-functions/latest/dg/amazon-states-language-task-state.html

All work in your state machine is done by tasks. A task performs work 
by using an activity or an AWS Lambda function, or by passing parameters 
to the API actions of other services.

Parallel in itself may have lower limits that I don't know of.

In my experience, we try to avoid Parallel with too many branch. We rather go with Step Functions launching other Step Functions in some Parallel like yours

See https://docs.aws.amazon.com/step-functions/latest/dg/sample-start-workflow.html

Step-in-Step reduces the complexity of workflow management in edge conditions.