What was this executive function and role that makes it so notable that it's the latest and another departure from Apple. Walker was in charge of Siri. It's as simple as that.He was leading Siri for the last several years, but he was demoted out of that role in the spring when Apple realized that it would need to delay its new Apple intelligence upgrade for Siri for upwards of a year. And after that, Walker was removed from his position. His boss, John Gene Andrea, was removed from overseeing both Siri and ...