User blog comment:Mr. Smithers Secret Lab/Problems with UCP Wikis/@comment-43705896-20200617023348/@comment-44807868-20200617043329

What comments are you referring to have been disallowed? If you're referring to the article comments feature, then it's already been available to UCP wikis since several days; it may be enabled through AdminDashboard.

If you want to know the reasoning behind UCP, then you may want to read User blog:MisterWoodhouse/Unified Community Platform: The Vision, Purpose, and Process.