Core Viewpoint - The iPhone Air is not discontinued; rather, it is in a temporary halt of metal component production due to sufficient existing inventory to meet current orders. Apple plans to resume production after accumulating more orders [4][5]. Sales Expectations - Initial sales expectations for the iPhone Air were low, with internal estimates around one million units, compared to tens of millions for the iPhone 17 standard and Pro versions [5]. Technical Exploration - The iPhone Air serves as a platform for Apple's future technological explorations, focusing on materials, design, and miniaturization of components, rather than solely testing for foldable screens [11][56]. Material and Design Innovations - The iPhone Air is the only model this year to utilize grade 5 titanium, which enhances strength, heat resistance, and durability compared to pure titanium [15][18][21]. - The device features a unique stacking design that optimizes internal space, allowing for a larger battery while maintaining structural integrity [24][26]. Component Miniaturization - The iPhone Air employs a dual-layer stacked motherboard, significantly reducing thickness and weight while maintaining high processing power, indicating potential applications in wearable technology [42][46]. - The use of System-in-Package (SiP) technology allows for higher integration and performance in a smaller footprint, reflecting a shift in Apple's design philosophy towards prioritizing compactness and efficiency [46][52]. Future Directions - The iPhone Air embodies Apple's commitment to innovative design and future technology, hinting at aspirations for a more integrated and advanced device, potentially resembling a transparent iPhone [56][58].