I disagree that something like this could have been an oversight. A designer spent time coming up with the new animation, it was approved by somebody in a proje

I disagree that something like this could have been an oversight. A designer spent time coming up with the new animation, it was approved by somebody in a project management role, and engineers had to spend time implementing the new feature. Apple has an intense culture of dogfooding, so it would surprise me very much if someone in a leadership position didn't experience the new page-flipping animation, much less explicitly approve its design.