Do you like sour stuff?

I couldn’t vote “I have a bottle of citric acid in the cupboard.” It is pretty cheap and a little goes a long way, great to have on hand especially when you need to hack your way to quick buttermilk. Tastes better than vinegar/lemon juice methods.

Very much depends. Lactic and Pedio sourness is beer I can get down with. Acetic is a big negative.