Over his 15-year reign, Tim Cook has navigated Apple through two Trump administrations, one Biden administration, a series of legal battles over encryption, antitrust and the Chinese market, while becoming one of the world's richest men. Now, incoming CEO John Ternus faces an AI landscape fraught with uncertainty as he takes on the helm.

The battle for privacy is far from over. After refusing to break encryption in 2016, Cook’s stance set a precedent that still defines Apple today. With the incoming CEO, this identity and its implications will only grow more complex.

Apple’s App Store antitrust wars are far from resolved. A potential $38 billion fine looms as legal challenges continue to threaten the revenue model of one of the world's most valuable companies. Ternus inherits a fight that could drag on for years, with the Supreme Court potentially playing a role in the outcome.

China remains a key challenge. Cook’s decisions to conform to Chinese regulations, while insulating Apple from trade risks during Trump’s first term, have left the company deeply intertwined with Beijing's policies and expectations. Managing these relationships will be crucial for Ternus as he navigates the geopolitical landscape.

The immediate AI challenge is equally daunting. As John Giannandrea steps down following delays in Siri’s AI capabilities, Apple has turned to Google’s Gemini and OpenAI’s ChatGPT to bolster its AI efforts. Ternus must balance these external tools with Apple's own proprietary technologies as the race for AI dominance intensifies.