In a few weeks, 1% of creators already using YouTube Studio will no longer see the ‘back to Classic’ button – you’ll be notified 1st & can still access Classic features you need! This won’t apply to everyone else until early next year. More info → https://yt.be/help/a7mG
Classic is way better and the new Studio Beta transfers us to Classic for half of the things, like adding subtitles, cards, or end screens to videos. Beta is still very incomplete and the New Editor is really problematic when it comes to adding End Screen. First complete Beta.