I’ve tried the lemon and the vinegar for the buttermilk substitute and much prefer the vinegar since the other tastes too lemony. It has been my go to substitute when I make pancakes/waffles since I was a teen. It makes them so high and fluffy. The smell of buttermilk makes me ill..
I like buttermilk so I usually have it on hand. My mom always used 1 tsp of vinegar to 1 cup of milk. I see some use 1 Tablespoon. Guess it depends on how tart you want it.
I’ve also read that you can add 1 tsp of vinegar to bread dough to make it like sourdough. Haven’t tried it yet, but will.
I like the other available options just in case one doesn’t have vinegar on hand either. I can see where the lemon juice might make it lemony. I can’t stand orange zest in baked goods, so I understand.