It's straight from the 2000s, with Linux users using Compiz and... Amethyst(?), stuffing their entire desktop full with gaudy transparency, transforms, jiggles and bounces.
More of a nit, but the sentence
The new design extends across iOS 26, iPadOS 26, macOS Tahoe 26, watchOS 26, and tvOS 26 to establish even more harmony
is so ironic and funny. No one noticed how talking about "harmony" whilst having one single platform use a codename next to the version number just screams inattention to detail?Just kidding: Yeah, it's just that when I think about a digital glass effect it feels more right with square corners than rounded corners. Because glass windows which we look through usually have square corners. Says I, who spend most of my time looking through a curved motorcycle helmet visor.
That's why we have round glass coasters, round lenses, round glasses for drinking, etc.
I'm very curious which items you went through before concluding that glass almost never has rounded corners.
I can barely cope with their being no option to turn them off on Mac, especially for windows. I literally had to make my background pure black because the few pixels of backgrounds always showing pissed me off so much.
Yeah, this really looks like an Apple temper tantrum of "Nobody wants to program for the Vision Pro? Fine. We'll MAKE you program the iPhone like the Vision Pro. Take that developers. Now get back to doing our job for us, you lazy slobs."
So, you can either assume that Apple are blundering, incompetent dolts who have completely lost the plot (certainly possible) or that Apple has an actual purpose behind this.
If you ask for the purpose and the look at the GUI, you see Apple cramming a UI update targeted with the design language from AR (transparency behind everything, motion cues to activate orienting reflex, etc.) down the throats of all developers as opposed to just those on the Vision.