This has been my view of Amazon+Kiva as well, there is obviously some problems with rolling out Kivas everywhere since little has happen. The problems I've seen

This has been my view of Amazon+Kiva as well, there is obviously some problems with rolling out Kivas everywhere since little has happen. The problems I've seen stated are the big initial cost of deployment, like invest at least ~$1 billion to save $1.8 billion, this article also mention really flat floors. I also guess it's hard to iterate the design if you change all warehouses directly so to spread out the risks you go slow. According to the article Amazon now have 30k Kiva robots and that in all of the US there are about 200k more warehouse workers since 2007.