A few days after a lawyer used ChatGPT to write a brief filled with made-up cases, a group of A.I. experts released a letter warning of the “risk of extinction” from the technology. But will A.I. ever be good enough to pose such a threat? Then, FAANG is now MAAAN, with the addition of Nvidia. Here’s how the GPU company became a trillion-dollar behemoth. Plus: Kevin, Casey and the New York Times tech reporter Kate Conger answer Hard Questions from listeners. Today’s Guest: Kate Conger is a technology reporter in the San Francisco bureau of The New York Times. Additional Reading: A lawyer used ChatGPT the same week that A.I. leaders released a 22-word statement about the existential risk A.I. poses to humanity. The chip company Nvidia hit a $1 trillion market cap, powered by A.I. demand. The podcast “Acquired” did a two-part series on the history of Nvidia.