Will anybody pay that much?
Fast food prices have risen enough this past year that a person takes pause before diving into the burgers and french fries. I say it has reached the price peak.
I may have gone to a fast food place maybe 2 times in the past 4 months. Generally, I bring leftovers to work and nuke them in the company lunchroom. When we go on trips, I just pack some cheese and cold cuts in a cooler, rather than stopping at a fast food place.
This just increases the incentive to automate more. The sandwich counter at my local convenience store does a brisk business. They have touch screens where you enter your order, so they just need somebody to make the sandwich.
Once somebody figures out how to make a robot that can make burgers and fries, these fast-food workers are gone.