User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-45171933-20210104190017/@comment-1038387-20210104193904

That's not entirely true though. They worked closely with many of the large wikis to make sure the transition would not break things. Wasn't water tight of course. Still broke things.

They thought things through: they were realistic enough that with thousands of wikis, each with their own style ideas and customizations, certain templates were going to stop working and it was not feasible to hold everyone's hand. Documentation is still lacking, though.