User blog comment:MisterWoodhouse/Social Activity, the 2010 Editor, and Unpausing Migrations/@comment-26843482-20201012202739/@comment-5290187-20201012204733

At least these migrations won't be happening right away, it will be in a few weeks as stated in the banner. If you want to try out UCP there's an UCP test wiki for it for everyone to try it out. There's no going back to Legacy or any unmigrations, we can't be on an outdated platform forever. Fandom needs to go forward and improve their platform.