I only have that option on my clients who have switched.  And it doesn't say "Switch", it says Easily opt out your client to use the previous version of QuickBooks in a bold letters.  That does not populate for my clients who have not switched.  I'd also like to add that the difference isn't as big as I thought.  When I first made this post, QBO must have been glitchy because the left menu panel was completely gone, and I couldn't figure out how to navigate.  During "normal times", the menu is there.