Meta CEO Mark Zuckerberg makes a keynote speech at the Meta Connect annual event at the company's headquarters in Menlo Park, Calif., on Sept. 25, 2024.Manuel Orbegozo | ReutersMeta CEO Mark Zuckerberg was so optimistic last year about his company's Llama family of artificial intelligence models that he predicted they would become the "most advanced in the industry" and "bring the benefits of AI to everyone."But after including a whole section on Llama in his opening remarks during Meta's earnin...