User blog comment:MisterWoodhouse/The first Unified Community Platform release is now live for NEW wikis/@comment-1998339-20200312154950/@comment-1998339-20200312160309

They both have uses. The problem I have with WikiActivity is that it fails to show changes made on namespaces other than main. For example, it doesn't show when users remove threads from message walls, edit templates, move pages, upload images, etc. That said, it's a useful, clutter-free means of monitoring the mainspace, the place where the bulk of the community editing happens, so I consider it a useful tool I'd like to see migrated over to the UCP.