Voyag, good point. Some folks might not like the idea of geting something frozen from a restaurant.
The problem is that many of these items are hard to cook when ordered. They take to long and are to hard to make for just for a few people. That is why there are so few comfort food places, maybe?
Many things do not freeze so well and need to be served fresh. Some things, lke chili and some soups, get even beter when frozen and reheated.