Yeah, I'm not saying they'll replace meat consumption. It's just a question of how do you think it's viewed by vegans. However, about sustainability, the cool thing about oysters is it doesn't really take input. They filter the water and grow, then we consume them. The economy of consuming oysters has actually helped fund restoration efforts to increase oyster populations in a lot of places, so they have a positive feedback on sustainability right now at least.

Yeah, if we were to try to replace all protein with them it probably would be negative, but I think, right now, they're an amazing source for ethical and sustainable protein. If you're not fine with eating them that's cool, but I think more people should and it'd have positive benefits ecologically and ethically.

I am not aware of any animal product for which there aren't already alternatives. Do you have examples

I know animals are often used for medical applications. Not just testing, but for growing things. I think insulin used to be produced in some animal, but I think that's switched mostly, if not entirely, to yeast. I have no idea if there's anything industrially that can't be replaced, but I know animal products are used in many applications. I would be surprised if there's not at least one that has no alternative yet, but I don't have the knowledge to say.