Apple Inc. is undergoing a leadership reshuffle with the departure of Tang Tan, the vice president of product design, who was instrumental in the design of the iPhone and Apple Watch. Tan's responsibilities are being redistributed within the hardware engineering team, with deputies like Richard Dinh and Kate Bergeron taking on expanded roles. Matthew Costello will take over Tan's duties related to accessories and the acoustics team. This change occurs as Apple continues to face a competitive tech landscape and prepares for future challenges. AAPL shares saw a slight increase on Friday and after hours.