I can't imagine the bots could ever cost McDonald's less than people cost.

15 years ago I worked at McDonald's for a few months after graduating into the Great recession. I worked from 5am to 1pm-ish 5 days a week. They paid workers weekly and I remember getting those checks for ~$235 each week (for 38 to 39.5 hours a week; they were vigilant about never letting anyone get overtime). About $47 per day.

The federal minimum wage has not risen since then, remaining at $7.25/hr. Inflation adjusted, $7.25 today would have been just under $5 then, so I guess I had it good.

Anyway, I would be shocked if bots could cost less than labor in min wage jobs.