Earlier quoted context omitted.
I'm not sure when the last time you tried the assistant was, but Google's speech-to-text is getting ridiculously good. I think most of the time, it would be able to get even complicated orders correct. Anyways, I'm sure that for the 10% where it doesn't work, they can install an interactive touchscreen for correcting orders (or have an app). And for the 90% of the rest, they save a ton of money by having computers do…
Have you seen people order? I would shoot half the customers if I worked a fast food counter much less the drive through.
With the near ubiquity of internet connected phones and tablets, making a greater push for people parking outside the restaurant, ordering on their phone and having it delivered to their car curbside seems like the better medium to long term play. Get rid of the drive thru altogether. Likely would make the entire place safer for pedestrians too.