Apple has introduced a brand-new 'Liquid Glass' interface design in iOS and iPadOS 26, but most third-party developers and even some of Apple's own apps have not yet adapted to it. Currently, this design is only implemented in some native apps, while most third-party apps still use the old interface. The key to adaptation lies in the rounded corner design of the interface. Large software vendors typically update their UI at their own pace, and cross-platform developers adapt even more slowly. Technically, apps using cross-platform frameworks face delays in adaptation, and the 'Liquid Glass' design presents readability challenges in text interfaces. Most of the first adopters are small developers, while large vendors, due to the need to coordinate complex product lines and development plans, are progressing slowly in adaptation. The 'Liquid Glass' design is seen as a major visual transformation and is expected to permeate gradually. If Apple wants to accelerate its adoption, it needs to optimize development tools and take the lead in updating all its own apps.