> Animations are not just a fancy visual thing, they help the user understand what’s going on. Instead of teleporting the toggle indicator to its new position, let’s move it smoothly Unfortunately it is, just a fancy thing that too often makes it worse or just focuses on the wrong thing. Like in this case, what exactly is "going on" that requires this visual delay? It looks worse vs the original instant response, why…
Computer UIs need animations for the same reason they need shadows, gradients, and momentum: because these are aspects of the physical world that we already know how to interpert, so can be used "for free" to aid our understanding of the UI. Not using animations would likely be more taxing on our visual processing because nothing in the world moves discontinuously, so that would be a new thing to learn when using a c…
More like "for the same reason a fish needs a bicycle".
>Not using animations would likely be more taxing on our visual processing
And yet, Windows 2000 era UI was far more intuitive, consistent, and self-discoverable than today's animated, shadowed, gradient-filled, blurry transulcent, momentum-having flat crap.