You don't have to worry about undercooked meat with robotic 'workers'. They cook it perfect every time. (I know because I designed and built one for a chain in Australia).

You have more chance of a human fucking it up.

I think it has more to do with the cost of "meat" (which we know is already heavily adulterated from being 100% beef) and labor.

Also when fast food is fully automated the corporations will no longer have any need for franchise owners. They will simply install a McTerminal "food" ATM.

Soylent Green more likely. It's the bad vax victims ground up so you can orally take the vax and hide the evidence. Soylent King and do you want fried with that?