User blog comment:MisterWoodhouse/Pausing UCP migrations to resolve some critical blockers/@comment-39096479-20200831132118/@comment-39096479-20200831134438

I personally don't like it because I prefer to have a preview on what I'm going to click (what WikiActivity gives) rather than just a whole list of "this thread exists, this user contributed", without any knowledge of what the thread is about, apart from what the thread title gives. I don't think comments and threads even show up in RecentChanges on UCP (correct me if I'm wrong)-

However, I do admit it's rather useful that user rights and MediaWiki page edits show up in RecentChanges.