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
Finish the product 'completely' first, before you start forcing people to use it (like how my bookmarked 'classic' comments page is CONSTANTLY reverted/downgraded to the 'new' studio version). All I've seen is people disliking the new studio... maybe you're on the wrong track...