Mark Zuckerberg just delivered the most candid admission yet that Big Tech's AI pivot isn't paying off as advertised. During an internal town hall on July 2, the Meta CEO told employees that the company's AI agent development "hasn't really accelerated" over the last four months and that the reorganization's goals "haven't come to fruition yet," according to a recording heard by Reuters. Meta's stock is down 11.7% year to date through July 2 — trailing a roughly 9% S&P 500...