Different diets seems to be something exclusively for the privileged. If you were actually starving or trying to survive in an current armed conflict I think you might be less concerned with deliberately limiting or excluding Main Staples. But then again I could be wrong.

Obesity among the world’s population is increasing. If the thing to do in 2017 was to have a meat free day – then for 2018 it’s to try eating Vegetarian (or Vegan meals). That said generally speaking, an omnivore diet is more unhealthy then a plantbased or vegetarian one. People generally it less fruit and vegetables than what’s recommended. It’s unrealistic to think that 7,6 billion population unanimously suddenly will become vegans. If that happened the meat industry, cattle farms, and professional fishermen and fisheries would be unemployed. With an increased interest in (plantbased) vegetarian and vegan dishes it suddenly means that it no longer is boring to adhere to a vegetarian or vegan diet. Although the vegan main staples (excluding fruit and vegetables) might run out faster.