Sam's Club stores is axing all self-checkouts from its 600 stores — in favor of controversial new technology. The Walmart-owned warehouse chain, often seen as Costco's biggest rival, is rolling out AI-powered 'Scan & Go' tech that lets shoppers skip the line and walk straight out the door once they're done shopping. The move is controversial because it uses a network of cameras and sensors to track shoppers and their carts. In addition, the checkout-free experience requires all customers to use a smartphone and download the store’s app. This could pose a challenge to older shoppers who may struggle with...