I don't understand the whole superiority complex vegans have. Glad that you decided to go with a meat-free lifestyle, but it's not what everyone is used to and I don't see our society headed in that direction.
Also, for some people, being a vegan is way too expensive. For instance, in my area, cow's milk is half the price of the cheapest dairy-free milk and sometimes, people can't just afford to shell out the extra just to be vegan.