Less than ten months after its celebrated debut, OpenAI's AI-native browser Atlas was quietly retired in August 2026, its ambitions absorbed back into the ChatGPT ecosystem from which they sprang. The episode illuminates a recurring tension in technological history: the gap between what is technically visionary and what is economically viable. Building a browser from the ground up—one that treats artificial intelligence as a native citizen rather than a guest—proved to cost far more than it could ever return, even for a company with hundreds of millions of users. Atlas's closure may mark not a