User blog comment:MisterWoodhouse/Volunteering your Fandom wiki for early migration to the Unified Community Platform/@comment-24258073-20200409004045

I certainly won't be supporting early migration for any of the wikis that I administrate. At least not ones that I'm active on, or ones that are active. Since it would mean that CSS and JavaScript would no longer be usable until they are enabled on UCP wikis.

Kinda disappointing since I would have preferred early migration of some of the wikis that I administrate to access some of the UCP only features like merging page histories and moving category pages.