User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-172.56.23.254-20210120205414/@comment-1038387-20210120212027

That's a wiki made with the Community Builder. CB was an experiment in data ordering that did not use MediaWiki. It failed. Most had been converted before but there are some stragglers.

Basically, all the crying of "it's ruined! it's broken!" that people do for UCP? You would hear me say that if Fandom had decided to go with something that would actually ruin and break things, like CB.