There are probably some challenges with upgrading their manufacturing systems to generate and print the codes out. Currently standard UPCs for a lot of product

There are probably some challenges with upgrading their manufacturing systems to generate and print the codes out. Currently standard UPCs for a lot of products are pre-printed at a vendor with all the rest of the packaging (like for bags of chips, all the UPCs are already printed on rolls of film that are stored at a factory before they're filled). They'd have to change it so that this newer 'UPC' would be printed during manufacturing like a code date would be. They'll probably start moving towards it; especially since it'll also give better control over getting feedback on product quality from consumers or communicating recalls. Right now, it's kind of cumbersome, because things that are coded with lots or manufacturing code dates aren't really that easy for consumers or retailers to use.