We might be killing ourselves much faster than "climate science" suggests

[Beskar]

How many people are going to stick to a vegan diet? Why wouldn't people eat the now rarer and thus more prestigious meat? What studies are there of a large population moving towards a more vegetarian diet, in particular the practical aspects of moving them to such a diet and making sure they keep to it? If you can't do this, there's no point in talking about the vegan-approved synthesis of dietary requirements.

Well, there are effectively vegetarian-like diets in existence around the world, due to meat being such a luxury item in the first place. If there isn't the availability, there is no need to make people "stick" to it.

There is also other technology like lab-grown meats which are an alternative. There are also GM solutions to making sure people get their nutrition.

There are also shake based diets which do away with cooking and meat all together, but they are rather bland, example of these being Huel and Cambridge but these run into a problem due to swallowing concerns.