Agreed!

Commenting again to say that the A/B feature would be even more powerful if we could duplicate emails, as it is an essential aspect of applying tests.

This would be very useful when adding a new email that is a variation on an existing one, for example when creating a new branch or A/B test in a workflow.

Especially when the email in question has a lot of translations that you'd like to preserve.

Or if you want to update an existing email in a workflow, so you can stage new content based on the old content.

(we usually just put it behind a filter that will never succeed, would be nice if you could have floating nodes that aren't connected to anything for this purpose)

Agreed. This would save me a lot of time!