I believe it's the parallelism. The subway setups I've seen only allow for about 5-6 concurrent sandwiches, an assembly line of sandwich artists working seriall

I believe it's the parallelism. The subway setups I've seen only allow for about 5-6 concurrent sandwiches, an assembly line of sandwich artists working serially, and their ingredients are basically preprepared. Sounds like this Michelin cook was handling the preparations of each ingredient, including making sure each ingredient is ready at the same time, and then plating them. The quantities of each ingredient they were handling at a time was also much greater.