Board Thread:Support Requests - Getting Technical/@comment-32704847-20201007020024/@comment-9605025-20201007021446

Yes, that namespace still exists on UCP because the content is left intact for wikis that used the old discussion features. However, they cannot be accessed normally due to Fandom's implementation of a system that redirects users to the converted Feeds thread/post. That said, you can still access the content via the api. Special:RecentChanges only keeps a record of the last 3 months or so. As such, entries in this namespace will naturally disappear from the list once enough time has passed. However, I don't think it should be removed from the interface or from the other special pages your mentioned. The reason is that it is still a namespace that may contain content so it should still be accessible via logs in the event that anything happens. But that is just my opinion.