It would be extremely helpful to be able to publish multiple versions of the same help center article, and target them to different audiences. The primary use case for this is beta testing and deployment rings. Some features will eventually be released to everyone, but some customers/user groups get them sooner than others. It is not manageable to make duplicate copies of every single impacted article, then do a bunch of copy pasting and deleting.
Ideally it would work like saving a draft of a published article - click into it to see the updated version, and then eventually overwrite the current article with the updated content without breaking any existing shared links to the content.