Arguments over its health aside, it is super expensive (especially in certain regions where fresh produce is a rarity), and the militant vegans who shame everyone else are incredibly short-sighted to not take that into consideration.
For the record, I've never been vegan, but I have spent fairly long periods of time in the past either being a vegetarian or a "beady-eyed vegetarian" (i.e., only eating animals with beady eyes like fish and poultry). I don't think I'll ever try vegetarianism out again, but I don't exclude the possibility of being selective about my meat intake again.