What does it take to build a billion-user platform?
Core argument: Apple, Microsoft, Alphabet, and Amazon together account for 21% of the S&P, with Apple and Microsoft alone large enough to constitute the index's second-largest sector behind the rest of big tech and ahead of energy and healthcare.
More than ever, our economy runs on ecosystems. Not just broad partnerships, large commercial deals, or expansive networks, but ecosystems. It’s to our collective interest that there’s maximum competition at the foundational platform layer and every application and service layer, too. But the cost of competition is now in the tens of billions, if not more. In a weird way, Google Cloud is cheap at $35B, but most can’t spend that much, let alone wait fifteen years for losses to end and another decade or more to generate a net return. In fact, it’s likely Google couldn’t have invested as heavily were it not for near-zero interest rates over the past decade. And that the investment wouldn’t have worked at all were it not for Google’s own ecosystem, including the consumer-facing (and Android-integrated) Google Photos, Gmail, and Drive, as well as its enterprise offerings such as Workspace. The prohibitive cost of entry has led to phenomenal profits. Apple, Microsoft, Alphabet, and Amazon are now 21% of the S&P (Apple and Microsoft are so large that alone, they would be the second largest sector of the S&P, behind the rest of big tech, and ahead of energy and healthcare).

