If you have built anything with long-running stateful workflows — loan approvals, order processing, subscription lifecycles, insurance claims, onboarding funnels — you have probably hit a wall that nobody talks about cleanly.

You need to change the workflow. But you already have thousands of instances running.

The problem nobody has a clean answer to

The standard options are all painful.

Wait for instances to drain naturally. Fine if your workflows complete in minutes. Useless if they run for weeks or months waiting for human approval, document submission, or payment settlement.