Last week, we interviewed Sam Altman. Since then, well, everything has changed. The board of OpenAI, maker of ChatGPT, fired Altman as chief executive on Friday. Over the weekend, it looked as if he might return. On Sunday night, Microsoft hired Altman to lead a new A.I. venture. Who knows what will happen next. Today, an update on a crazy weekend in tech, and our interview with Sam Altman.