I have noticed that many of these fast food places are starting to aggressively push the self-serve ordering machines. This is what I am talking about:

https://thumbor.forbes.com/thumbor/960x0/https%3A%2F%2Fblogs-images.forbes.com%2Fedrensi%2Ffiles%2F2018%2F07%2Fmcdonalds-1200x783.jpg

I don't usually eat at Taco Bell, but one time it was the only place around so I went in, and you actually cannot give your order to a cashier any more. Instead, when I tried to give my order to the cashier, she said she would show me how to use the kiosk. So, giving your order to a worker isn't even an option any more.

Has the tech revolution come? Have advances in technology made cashiers obsolete? I would say no, because these kiosks are functionally exactly the same as fast food cash registers. For many years now, the McDonalds cash registers have worked by the cashier selecting pictures of the menu item on a screen. This is what it looks like:

https://i.ytimg.com/vi/fxgjTtbUg3Q/maxresdefault.jpg

So these kiosks are really just cash registers. So really the labor is just being shifted from the workers to the customer.