User blog comment:MisterWoodhouse/Social Activity, the 2010 Editor, and Unpausing Migrations/@comment-172.56.23.5-20201120185547/@comment-45344423-20201128004256

"Legacy runs on half-decade out-of-date software. It needed to go years ago."

--NightingaleWishWash546

Yeah, Legacy is kind of outdated. UCP isn't finished yet, so the migrations needs to pause until late 2021 or early 2022.