I do not understand apps that add animations that can't be fully turned off like os x and others. The designers of such apps are clearly delusional in thinking that I want my user experience slowed down the millions of times I'm going to use a feature like changing spaces in os x. That's not an exaggeration. Same thing with unskippable cut scenes in video games. Or anything like that that's not essential and is going to either be happening thousands or millions of times or takes longer and a split second. These designers, as most designers, are designing for eye candy, not usability. They should be fired for such stupid and human unfriendly decisions. That's how bad such UX is. Especially Apple's which makes their spaces completely unusable.