The economics will make sense in our lifetimes. For a more concrete value, let's say 50 years. Also, McDonalds is open far more than 40 hours a week. It's more

The economics will make sense in our lifetimes. For a more concrete value, let's say 50 years. Also, McDonalds is open far more than 40 hours a week. It's more like 6am to 1am, seven days a week. That gets paid off in 8.5 months. The real number would be a little higher than that due to fluctuations in demand throughout the day that would require extra robots that aren't fully utilized. Even if you triple the cost of the robot, that still isn't an unreasonable cost/benefit ratio. Within the next 50 years, it will be a no-brainer.