Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
When you say off. Do you mean that you have turned on reduce motion?

It does not matter if it is on or off. YOU decide if you want it and if not you can turn it off. Some have claimed it makes them dizzy, so adjust as you wish as it is just a simple animation.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.