Naw, my family and I, including two young children, have not eaten any animal products for a year. We've had a variety of really tasty food, and no nutritional deficiencies. Cost is no more than meat, in fact less. Other than "mmm, but bacon tho", there is no material difference from before we quite meat. To compare with cars, which have undeniable utility, especially in a place like LA where we live, is disingenuous.