[gldalmaso]

There are other possible solutions to auditing a database.

I work on a product in this segment (food traceability) and from experience I expect walmart to encounter possible operational issues by adopting the complexity of the blockchain into their solution.

The first one is tech-literacy. Like the article says, and is usual in this segment, producers and distributors have to adhere to the program to continue to sell to walmart. Often they just see it as a burden and don't perceive any value add for them, so they resist using it as much as possible. Data input must be incredibly simple and fast (produce can't sit in stock for long). If there is some exotic problem regarding certificates, keys or anything more elaborate than filling simple forms, then the producer will not be able to move his product until it is resolved with risk of having his shipment returned.

Unless you do all the work to set up the client side of tech, which means generating all the keys for everyone (making the whole endeavor pointless), the UX will be a major obstacle.