Altman, Musk, and Hassabis back Amodei's call to add independent oversight

What happened
Sam Altman, Elon Musk, and Demis Hassabis back Dario Amodei's call to slow down AI development, at least in part. Altman says OpenAI is pushing its IPO to 2027 over safety concerns.
Summary assembled by rule from the sources below