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The robots were too efficient. They could bring items so quickly that the productivity expectations for workers more than doubled Here's an old Kiva Robotics video that shows how picking works.[1] It's an utterly mindless job. An automated laser pointer points to the bin from which to take an object. A lighted button shows which box to put it in. A new bin then moves into position, and this goes on. Training time req…
THe Kiva video is not state-of-the-art I think. Check out this automated grocery warehouse, something right out of Factorio: https://www.youtube.com/watch?v=4DKrcpa8Z_E Humans would just get in the way and get mangled.
Btw: This Autostore system is becoming the standard automated warehouse system for Swedish e-retailers, as they prepare for Amazon entering the Swedish market in a month or two.
I think there are at least like 10 very large Autostore installations in Sweden for various niche online e-retailers. And like 20 "large" installations.