What are the advantages and disadvantages of cold dish kitchen and hot dish kitchen not on the same floor?

The advantage of not having a cold dish kitchen and a hot dish kitchen on the same floor is that it is healthier and more hygienic, but the disadvantage is that it is inconvenient.

according to the food safety operation standard of catering service issued by the state food and drug administration, if restaurants want to sell cold dishes, they need a special cold dish room in the kitchen. Cold dishes need a fixed temperature environment to avoid rapid decay, while hot dishes need to be cooked by fire, and the environment temperature is high, so the environment requires separation in order not to affect each other. Secondly, cold dishes are mostly cooked food, and the raw materials of hot dishes are mostly cold. For the sake of public health, raw and cooked items should be separated.