Sam Altman said questions about whether AI spending will pay off are "the most fair" criticism of AI right now. Bloomberg/Getty Images Sam Altman said AI spending concerns are "the most fair" criticism of AI right now. Investors are increasingly worried about whether AI's hefty costs will translate to revenue. An AI researcher recently called AI spending the "greatest capital misallocation in history." Sam Altman is addressing one of investors' biggest concerns about AI. During a CNBC intervie