"Vegan" butter is margarine, renamed by today's cool kids.

Corn-oil margarine was what my Jewish classmates had on their all-beef salami (Shopsy's, with the rabbinical seal of approval on the wrapper) sandwiches back in 1965. Parev, so okay with meat. Roll the calendar forward about half a century and lo! it's being marketed to a new dietary minority.

That's fine, as long as I don't have to eat it.