For a mature company like Apple, the ideal successor to an operator like Tim Cook may not be a risk-taking visionary. A leader like John Ternus, known for maintaining products and driving margins, can be more valuable for sustaining dominance and incremental growth in established markets.

Cook's potential retirement isn't about failure but preserving his legacy. He could exit after a record-breaking quarter, before the high-stakes AI bets of competitors either collapse the market or prove Apple is too far behind, protecting his track record.

The young Steve Jobs famously vilified IBM in the iconic "1984" ad. However, upon returning to a failing Apple, the older Jobs recognized his own operational weaknesses. He hired a wave of talent from IBM, including Tim Cook, to instill the discipline in logistics, procurement, and manufacturing that he had previously disdained.

When a clear number-two executive like Jeff Williams retires unexpectedly, it's often a signal they were passed over for the top job. This pattern was seen at Amazon when Jeff Wilkie left right before Andy Jassy was named CEO, suggesting Tim Cook's replacement has been chosen.

The ultimate differentiator for CEOs over decades isn't just product, but their skill as a capital allocator. Once a company generates cash, the CEO's job shifts to investing it wisely through M&A, R&D, and buybacks, a skill few are trained for but the best master.

Even with full board support, a successor CEO may lack the intrinsic 'moral authority' to make drastic 'burn the boats' decisions. This courage is harder to summon without the deep-seated capital a founder naturally possesses, making company-altering transformation more challenging for an outsider.

Successor CEOs cannot replicate the founder's all-encompassing "working memory" of the company and its products. Recognizing this is key. The role must shift from knowing everything to building a cohesive team and focusing on the few strategic decisions only the CEO can make.

Rumored next CEO John Ternus is known for maintaining existing products, not developing new ones. This suggests Apple may prioritize operational stability and market dominance over the disruptive, visionary leadership embodied by Steve Jobs, signaling a strategic shift for the company's next chapter.

Tim Cook's legacy will be judged not only by Apple's massive growth but by the strategic position he leaves for the next CEO. Unlike Steve Jobs, who left a clear product roadmap, Cook's successor faces an uncertain AI landscape, which could retroactively impact Cook's own historical standing.