AI's golden boy, Sam Altman, may be starting to lose his luster.Under his stewardship, OpenAI is facing a fresh wave of controversy, including the use of tight nondisclosure agreements to silence employees and a public spat with a famous actor.The company has also been dealing with comments from former executives that its commitment to AI safety leaves much to be desired.Gretchen Krueger joined those ranks on Wednesday when the policy researcher announced she had parted ways with OpenAI.Extincti...