Variety isn't necessary for survival. In my case, it isn't even necessary for happiness. But if I want variety there is no shortage of it out there. In good times you might eat out every weekend. But when hard times come, you will be able to stay full for almost nothing. Having experienced extreme hunger due to a lack of money, I find tremendous value in it.
i do like chipotle. brown rice, black beans, chicken, vegetables, mild, sometimes cheese, corn, sour cream, guack.