Apple's AI Head John Giannandrea Departs After iOS 18 Siri Feature Delays

John Giannandrea, Apple's former AI leader hired from Google by Tim Cook, is officially departing this week. His exit follows the iOS 18 'Apple Intelligence' Siri fiasco, where Apple marketed unfinished features at WWDC 2024 and iPhone 16 launch, only to announce delayed delivery in early 2025. The departure signals internal challenges in Apple's AI strategy and product execution.