A lot of it may be information leak worry. You want just your data to be stored and some workflow engines require more than what is needed to make a decision.

A lot of it may be information leak worry. You want just your data to be stored and some workflow engines require more than what is needed to make a decision. We actually are releasing a use-case video that shows how to keep your data local and still be able to use a workflow engine in the cloud keeping your data local while making decisions and orchestration external.