Apple officially launched its redesigned AI assistant, Siri, at the Worldwide Developers Conference (WWDC) in Cupertino on Monday. The release comes two years after initial announcements and multiple delays. While a significant upgrade, the new Siri will not be available on 1.3 billion older iPhones. The company did not specify which iPhone models are incompatible, but the requirement for advanced processing power is believed to be the key factor. This limitation means a substantial portion of Apple’s user base will miss out on the AI-powered features. The launch marks Apple’s attempt to catch up with competitors who have already integrated similar AI functionalities into their devices. Further details regarding compatibility and specific features were presented during the conference.