Last Friday morning OpenAI was a perhaps the most envied company on the planet; a tech unicorn nearly 100 times over led by a pin-up of artificial intelligence courted by world leaders and confident he could walk the line between harnessing the power of superhuman computing and letting it destroy the world. As of last night, OpenAI was in corporate A&E. Its ex-CEO, Sam Altman, and ex-chairman, Greg Brockman, were gone, newly installed at Microsoft, and clear they were not coming back. More than 740 of its remaining 770 staff had signed a letter condemning the board for ousting Altman and Brockman and threatening to follow them to Microsoft if the board itself did not resign en masse. Almost poignantly, the signatories included the company’s co-founder, Ilya Sukskever, who also released a separate note saying he deeply regretted his part in the botched coup and wanted to unscramble the whole thing. Good luck with that. Read more in our Boardroom Sensemaker special.