[LrnByTeach]

>Easy to say, much much harder to implement, specially accounting for personal preferences( extra tomatoes, less/more spicy etc.

200 years ago, when every family is making their own tomato Ketchup, I am sure there must be 5000 very little variations of ketchup in USA. fast forward to today there are only 57 and all this is done by one company with couple of centralized locations and People who are used to those 5000 varieties confirmed to 57 varieties .

https://en.wikipedia.org/wiki/Heinz_57

When you consolidate and aggregate EACH of the food dish we eat will be consolidate into only 5 different variations. These centralized kitchens can handle 5 different variants ( Chinese Orange Chicken for example) and prepare 200 meals of each variety ( of total 1000 meals of Orange Chicken )

I have given an detailed answer on this issue in this thread, please search with following text.

Once the above AGGREGATION happens, It is not hard to have a sushi, Pizza, Thai, Chinese etc.. all under same roof Centralized Kitchen because the kitchen will be serving on a given day serving 1000 Pizza, 1000 Thai, 1000 Sushi, 1000 Subs etc.. for 30,000 population city