AFAIK vegans base their argument on the degree of consciousness a living being had and compromise on the least evil.

Most meat eaters base it on closeness to said living thing.

It'll be interesting to see if the veganism movement survives lab grown meat that is ethically produced.

It wouldn't continue in any real form. Maybe cholesterol conscious and devout buddhists will still try to adhere, but beyond that I don't see what the point would be.

It would be like how Ozempic lead to a mysterious quieting of Body Positivity/Health at Every Size advocates. They were a vocal minority, there was much "debate" and cri de couer from many sides and now its all evaporated without a farewell or explicit winding down.