alt Hacker NewsI still have Sonoma on some of my devices. All I can say is: wow, steady regress.
The save dialog, albeit a little shakey, is nowhere as chaotic as in your example. The buttons in Notes move between panes in a perfect seamless manner. Albeit the animation occasionally glitches out when you repeatedly focus and deselect the Safari bar, the cursor is perfectly timed with the text, only fading in after the text is done moving to the left. The Preview bug must be something recent too, I can't reproduce this.
I miss it when companies like Apple, Sony, and IBM paid attention to the smallest details. Apple in particular earned its current valuation with the iPhone, an all-touch device that did nothing extraordinary compared to Windows Mobile and Symbian PDAs of the time (and was in fact functionally lagging behind compared, failing to even match the then-contemporary feature phones in some areas) BUT one that you didn't actually want to smash against a wall after a few minutes of use. Now these animations are bringing back exactly the Windows Mobile and Symbian vibes.
Remember how happy Steve used to be with OS X animations? He would replay them on stage multiple times, in slow motion. These though, these would have the people behind them face the fate of the iPhone 4 antenna man.
The animations in your short video do in fact look more orderly and less chaotic. Could it be that Apple was using AppKit in Sonoma and switched to SwiftUI now?