Tim Cook is walking away from Apple on September 1 after 15 years as CEO, handing the keys to John Ternus, the company’s senior vice president of hardware engineering. On paper, it’s a clean handoff. In reality, it’s a transition that exposes where Apple’s legendary execution machine has actually started to sputter.
Cook didn’t inherit a struggling company. He inherited a company that had just lost Steve Jobs. What he did with it matters: he turned Apple’s market value from $350 billion in August 2011 into $4.01 trillion today. That’s a tenfold increase. Along the way, net income grew by 699%, reaching $112 billion in fiscal 2025. The company weathered COVID-19, U.S.-China tensions, and supply chain nightmares that would have crippled lesser organizations.
That’s genuinely impressive. But there’s a problem hiding in that achievement.
The Master of Everything Except What’s Next
Cook’s fifteen-year tenure can be cleanly divided into two categories: things he executed brilliantly and things he fumbled. The first bucket is enormous. The second is growing.
Start with what he actually nailed. Cook, who built Apple’s global supply chain under Steve Jobs, understood that the iPhone needed satellites in orbit around it. So Apple built them. The Apple Watch became a legitimate health device with blood oxygen tracking and ECG monitoring. AirPods disrupted an entire category. Apple Pay attracted 818 million users globally. Apple Music now has over 112 million subscribers. The services business alone generated $109.16 billion in revenue during fiscal 2025, making up roughly a quarter of Apple’s total revenue.
Cook also expanded the iPhone ecosystem into wearables and gadgets that actually complemented each other. He released multiple iPad sizes and price points, essentially turning tablets into genuine computers. He championed the transition to Apple Silicon chips starting in 2020, wrapping it up by 2023, which delivered longer battery life, better performance, and cleaner power efficiency. Apple Park, that 175-acre marvel of 12,000 employees and renewable energy, became real under his watch.
This wasn’t luck. This was a CEO who understood operational excellence and had the discipline to execute it repeatedly across massive product lines. For most of his tenure, Cook was executing a playbook that already existed. He was perfecting technology that either Apple invented or that competitors had already validated.
Then came the part where he had to actually innovate into the future.
When Vision Pro Met Reality
The Apple Vision Pro is the telling artifact. Cook positioned it as a spatial computing platform, not just a VR headset. It was expensive. It was beautiful. It was also a product people didn’t want to buy. When the device failed to resonate with consumers who balked at spending several thousand dollars on something that still felt experimental, it revealed something about Cook’s ability to read the market on genuinely novel products.
But Vision Pro is a footnote compared to the real problem: generative AI.
When OpenAI’s ChatGPT launched in late 2022, Apple essentially went invisible. While Google panicked and Anthropic built an entire company and Sam Altman became the face of AI’s future, Apple remained largely absent from what became the biggest technology race in a generation. Cook’s company didn’t release a major AI product for nearly two years. When Apple Intelligence finally arrived in 2024, it was cautious, incremental, and delivered by a company playing catch-up rather than leading.
It gets worse. Apple and Google just announced that Google’s Gemini would power Apple’s next-generation AI tools. Apple needed Google’s help. And the company’s anticipated revamped AI-powered Siri, which should have been table-stakes years ago, is still delayed and expected to roll out sometime this year.
This isn’t operational failure. This is strategic hesitation at exactly the moment when the industry’s center of gravity shifted.
What John Ternus Inherits
Ternus is taking over a company that still prints money, still commands cultural gravity, and still knows how to execute on hardware. But he’s inheriting one that’s no longer leading the business conversation. Apple is now following, responding, and hoping its brand loyalty carries it through an AI transition it didn’t see coming fast enough.
The $600 billion U.S. spending commitment Cook announced with Trump earlier this year, focused on semiconductor and advanced technology manufacturing, is a genuine investment in the future. That’s the kind of bold, long-term thinking Cook excelled at. But it doesn’t change the fact that Apple lost a crucial 18 months when it should have been planning for a world where AI was going to matter as much as the processor.
Cook’s legacy is enormous and real. He kept Apple on top even as the world changed around it. But he’ll leave behind a company that’s learned, somewhat painfully, that you can’t perfect your way into the future. You have to see it coming.
