Apple surprised the markets by announcing Tim Cook would step down as CEO this summer, and John Ternus would become the new CEO.
Cook will still be around, becoming the Chair of Apple. Over the course of 15 years, Cook took Apple from a $350 billion company to a $4 trillion company.
Revenue went from $108 billion to $466 billion this year, and its services business went from non-existent to $123 billion in sales.
His greatest triumph was around supply chains and logistics, keeping China on the company's no matter the state of relations with the US government.
Ternus was the head of hardware before being tapped to become CEO and has been with the company since 2001.
His appointment comes as AI has burst onto the scene, and Apple doesn't seem to have a player in the game.