User blog comment:MisterWoodhouse/Social Activity, the 2010 Editor, and Unpausing Migrations/@comment-44883881-20201109123409/@comment-24258073-20201112060631

Believe it or not, it was totally necessary. But I agree that the new editor cannot fully replace the old one until it has undergone an improvement. But I'm pretty sure that's exactly why it hasn't fully replaced the old one - on UCP wikis - yet, since it hasn't undergone a sufficient improvement.