It's jarring to see instant changes that don't make sense. Animations are primarily a way to paper over UI that sucks to begin with.

Many transitions in Android are perfectly fine at 0x animation speed. The majority of transitions that suck without animation suck because the pre-/post-transition layout sucks and the transition between the two states doesn't make sense as a result.

It's the same with several of the transitions in TFA. For example, the address bar placeholder text[1] should just be left-aligned all the time. The save dialog[2] should leave all the basic controls in their original location[3] when switching from the basic mode to the advanced mode. That means the "Where:" label should also remain in the advanced mode, and the controls[4] that pop up to replace it should either be moved to the right or below. The search bar should also be moved down.

These are some really basic details and it is my understanding Apple used to not screw them up nearly as badly.

[1]https://tonsky.me/blog/every-frame-perfect/safari@2x.mp4?t=1...

[2]https://tonsky.me/blog/every-frame-perfect/save@1x.mp4?t=178...

[3]https://imgur.com/ZpHLCsv Artist's rendition. Please excuse the minor jank and criminal amount of empty space; I couldn't be arsed to fiddle with the screenshots to get pixel-perfect positioning and shrink the advanced dialog horizontally. Bikeshedding over where exactly the new controls belong is welcomed but irrelevant to the point I'm making.

[4]Is it just me, or are their icons uselessly, impenetrably, unhelpful?