Group 1 - Apple has unified the naming convention for its operating systems across devices, adopting a "year + 1" format for iPhone, Apple Watch, Mac, and iPad [1] - The new design language "Liquid Glass" has been introduced, marking the first major redesign in twelve years since iOS 7's flat design [1] - The third developer preview of iOS 26 has been released, indicating that it is the version Apple considers most suitable for public testing [3] Group 2 - The "Liquid Glass" design in iOS 26 Beta 1 faced criticism for its high transparency, which interfered with content readability, but improvements were made in Beta 2 and Beta 3 [4][6] - iOS 26 Beta 3 has shown significant bug fixes and optimizations, including better battery performance and reduced frame drops, making it the most stable developer preview so far [11][13] - iPadOS 26 has received positive feedback for its new window management system and enhanced productivity features, while macOS 26 Beta 3 faced issues related to the Rosetta 2 compatibility layer [14][19] Group 3 - The challenges of the "Liquid Glass" design are highlighted, particularly its performance on smaller screens like the iPhone, where information density can hinder readability [30][32] - The balance between aesthetics and usability is emphasized as a critical challenge for Apple, as it seeks to cater to over a billion users with varying device sizes and use cases [32]