Android vs. iPhone

In 2007 Apple shipped the iPhone as a sealed system, hardware, OS, and App Store under one roof, and captured nearly every dollar of value in the stack. Google did the opposite: it gave Android away free to any manufacturer that wanted it, and within a few years it was running on most of the world's smartphones. One company built a smaller, fiercely loyal, high-margin base. The other blanketed the planet. Both bets paid off, and that is exactly the puzzle.

The open-versus-closed question is one every platform founder eventually faces, usually without realizing they've already answered it by default. The case lays out the trade-offs, control versus scale, margin versus reach, and forces a sharper question about what you're actually trying to capture. It withholds the trap most operators fall into when they try to have both.