Meta is a great company -- but its revenue concentration and platform dependence argue for a valuation discount versus its megacap tech peers.Meta Platforms (META 0.53%) financial results have been impressive in the first half of the year. Its strong growth has been fueled by robust advertising demand and an engaged user base across its social media apps. The company, which owns Facebook, Instagram, WhatsApp, Messenger, and Threads, is making significant investments in artificial intelligence (AI) and innov ...