Good question. I don’t know that I’d call this fear management, but maybe: the approved request for versioning in rich text. That discussion is pretty interesting, although I guess I’d say rich text history is the main one now given the audit log.
Maybe this thread isn’t the right place for the discussion, but essentially because of the lack of this feature, Fibery isn’t the easiest place to collaboratively write a document, having to shoe-horn in comments for changes etc.