It seems to be a bit more flexible than what you were proposing in that it is a generic stir-fry bot, so should be able to produce any stir fry dish from chopped ingredients. Going from many chinese to korean dishes would seem to be a software download and ordering the ingredients. I agree that for some restaurants ambience is a major factor, but for fast street food a machine like this could do very well.

Plus, many chefs I know also have durability and reliabilty problems.

OK,

Try baked Italian dishes. Clearly there's a limit to the thing's flexibility. Not all Chinese dishes was conventional wok cooking for example.

Also, most humans aren't reliable but generally, you "rent" them rather than buying them - your cook get truly unreliable, you can find another cook. You would almost certainly have to buy a specialize Chinese food (or Wok-cooking) machine and so you'd be providing not just "health insurance" but "health care" for it if it broke down.

Most Chinese takeaways are not well equipped for baked Italian dishes either. As for who owns it, I don't see why you wouldn't lease something like this in the same way that you can currently lease things like posh coffee machines when running a cafe so that if it breaks down it gets replaced by the leasing company.