Promoting a vegan lifestyle improves the quality of life in the long term. More people can be fed. Less farmland, as smaller yields must be spent on farm animals. Water quality improves. Resources generally become more abundant. Diseases of affluence will shrink. Health costs are lower, especially for people of retirement age. Enjoyment does not mean rewarding active leisure activities. Is consuming sweets and food containing bad fat after sports in nature a good idea? Who wants to feel worse after a holiday than before?