There will still be some recalls as most food borne illness takes a person to get sick from it usually before it's found. One of the reasons Walmart several months back went to using blockchain to track their food, it'll enable them to locate and track the whereabouts quicker.
https://steemit.com/parley-blockchain/@sunlit7/20181004t075830603z

Don't mind it got flagged, the guy who started Parley was mad at me for something totally unrelated and retaliated. Probably why you never hear much about Parley anymore, you can't operate out of emotions.