The news that technology powerhouse Microsoft is working on cashier-less technology that could help retailers compete with Amazon Go signals a major advance in this area. Still, questions remain about exactly what kind of solution will best solve shoppers’ checkout pain points. While some consumers may welcome a cashier-free environment, others might want more cashiers on duty to provide assistance if needed. Tech-savvy retailers are still trying to figure out the optimal way forward. Kroger has made major investments in its Scan, Bag, Go technology, which allows shoppers to scan products either with a device provided by the store or with their smartphones. The retailer is in the process of expanding the program to 400 stores, and Kroger CIO Chris Hjelm identified the technology as one of his proudest achievements of the past few years.