Andy Jassy says the 2015 acquisition of Annapurna Labs is “one of the very best acquisitions we've done at Amazon in the history of the company, if not the best.” Amazon acquired the semiconductor chip design firm for ~$350 million. Jassy said Amazon’s custom silicon would be a $50 billion run rate business if it sold Amazon chips to the market (as written in the April annual letter). The portfolio of Amazon chips includes Nitro (networking), Graviton (CPU) and Trainium (AI ASIC)…