Amazon.com Inc (NASDAQ:AMZN) is shutting down the lab and funding the battlefield. After years of experimenting with Amazon Fresh and Amazon Go, CEO Andy Jassy is pulling the plug on the underperformers and redirecting capital toward a 100-store Whole Foods expansion and a new physical "retail supercenter" concept. For investors, this isn't about retail aesthetics—it's about capital discipline and margin strategy.Amazon Fresh was expensive to run, slow to scale, and failed to meaningfully dent Walmart Inc's ...