This should definitely be moved to a higher priority in the update queue given a. how many people have been requesting it, and b. the fact that your competitors allow this functionality natively. Our client has multiple Whitelabel partnerships and they need to be able to have a separate knowledge base for each partner that is branded for that partner. One other note that would be incredibly critical for this particular use case is the ability to publish updates to one knowledge base and push it to the other white-labeled knowledge base pages.