If you think about them in isolation, maybe. But you have to apply them to DOM. Where every single little thing results in a re-layout and repaint. There are r

If you think about them in isolation, maybe. But you have to apply them to DOM. Where every single little thing results in a re-layout and repaint. There are reasons why you still can't animate height: auto. The built-in controls also don't help. Can't find it now, but details set display:none or visibility:none on closed contents, and that can't be animated. And there are a million such things.