I think this is funny. I worked on this team at Amazon for two years after successfully building an app similar to Dash Cart for another company using Elixir (which is still going). I repeatedly tried to convince Amazon to do Just Walk Out differently, but their toxic culture wouldn't hear of it. I got bored with the project (and a little disgruntled, to be honest) and left after my signing bonus ended.

I guess it is good that they figured it out in the long run, but they could have fixed this in 2020 if they had just listened.