I'd like to replicate in Production a story workflow and two simple sub-task workflows that have been tested and approved in the Sandbox. In Production, I think that until I link the workflow to a workflow scheme, I won't be affecting existing issues. The workflow statuses are unique to the workflows.
Similarly, I think I can avoid affecting existing issues if I build but don't enable automations; and create screens and custom fields but don't link them to schemes.
Please confirm and/or comment.