What does the workflow versioning story look like? This is one of the most frustrating parts of SWF that Step Functions + Lambda has effectively solved for us.
Cadence doesn't require workflow and activity type registrations which eliminates most of the problems with SWF versioning. Cadence supports versioning of the workflow code out of the box. Any change has to be protected with a version condition. It works even with shared libraries and very long running workflows.
