Mike Rockwell, who led the development of the Vision Pro headset and was responsible for the new Siri AI project, is seriously considering leaving his current position—potentially stepping down as VP of Siri Engineering next year or even leaving Apple entirely. His departure would represent a significant loss for Apple. If he ultimately leaves or moves to another role, the related work is expected to be taken over by Amar Subramanya and Sebastien Marineau. Some within Apple believe that Marineau, who has taken a more proactive stance on AI development, may succeed Federighi as head of software engineering in the future, with his team primarily responsible for integrating AI technology into the iOS system. However, Federighi still firmly controls the software engineering department, has not prioritized cultivating a successor, and has not established a clear succession plan. The succession process for the head of software engineering remains a distant prospect, and there are no indications that Federighi intends to leave within the next few years.