Generalizing a bit and admitting that this would vary across cultures: most vegans (who turned vegan for ethical reasons and have been vegan for quite sometime)

Generalizing a bit and admitting that this would vary across cultures: most vegans (who turned vegan for ethical reasons and have been vegan for quite sometime) would promote this for people who want to transition as well as to occasionally have this with non-vegans to show them what’s available. Left to themselves, they’d likely abstain from it for the most part since there are still some ethical questions about it (if FBS — fetal bovine serum — is used) and since there are a wide variety of foods already available to them anyway. It could be a once-in-a-while indulgence though.