"Every animation, ... is a loss in productivity" No it is not. A animation done right (that usually means very short duration), can give the information that

"Every animation, ... is a loss in productivity" No it is not. A animation done right (that usually means very short duration), can give the information that some transition between states has happened. Animations are only a problem if they are there for the sake of animation. So when you notice the animation, it is already too long and the designer screwed up.