DAG or looping/near-Turing? If DAG only, can it subflow/recurse, and to what depth? What is the underlying datastore that enables scaling? Primary integration

DAG or looping/near-Turing? If DAG only, can it subflow/recurse, and to what depth? What is the underlying datastore that enables scaling? Primary integrations? How are custom integrations done? "Web service call"? Spinnaker kinda sucks that way. Stop/Resume/Edit state to correct errors? Suitability for builds? (e.g. jenkins) Suitability for deploys? (e.g. spinnaker)