Hi @Aron Manning:, thanks for your feedback. Unfortunately, there is no demo setup available for this feature. You can create an edit conflict with yourself if you make one of the changes from a private/incognito window where you aren’t logged in to your account.
Whether the feature is available as a Beta Preference depends on which wiki you are on. On MediaWiki it is a default feature already, so it’s not shown as a Beta Preference in the list. The reason it’s still a beta feature on the roadmap is because it’s currently only a default feature on dewiki, arwiki, fawiki and Group 0 wikis (MediaWiki is in this group). For all other wikis it remains a beta feature for now. --For the Technical Wishes Team