Some may even be just CSS. I'm still waiting for a way to toggle the CSS ones off for all websites, without breaking them. These often even look sluggish, but

Some may even be just CSS. I'm still waiting for a way to toggle the CSS ones off for all websites, without breaking them. These often even look sluggish, but maybe it is a relative thing and some see the prompt movement of UI elements as unpleasant and call the animations "smooth". Or maybe it really takes a very powerful GPU on the right hardware to fully experience animations without feeling annoyed? Or both?