One of the more interesting things about factories is that a facility that has a robots doesn't guarantee high throughput. If the robot can work 10 times faster than the rest of the line does that mean it is mostly idle or does it work on multiple lines or do you have a wip queue somewhere and then you have more work moving stuff from the robot to inventory etc and lastly the great thing about humans over robots is that we are much more flexible and can try new things sooner to see if they work better. I wouldn't be surprised if there are stories of factories that got robots and their metrics went down.