Why limit AI features to iPhone 15 Pro models and onwards? Apple explains

At its Worldwide Developer Conference (WWDC) 2024, Apple unveiled a suite of artificial intelligence features that will collectively be called the Apple Intelligence. The US-based technology giant is poised to bring AI-powered features to devices based on Apple A17 Pro and M1 and onwards chips. This essentially limits the Apple Intelligence to iPhone 15 Pro models in the current iPhone line-up. Naturally, the future iPhones will support AI features, but older generation models and the baseline models in the latest iPhone 15 series are excluded. Why? Apple executives explained: