@Cathode
Iced ACV water (carbonated) is a favorite drink of mine. I love it's flavor, as long as there's not too much ACV (about a TBSP per pint water). As you say, the balance has to be just right.
I now keep malic acid in a salt shaker for convenience and use it more and more as an everyday condiment in seasoning food. It 'marries' with salt exceptionally well. I make and we consume a lot of pico de gallo, love the stuff. Salt and malic acid is now the only seasoning I use to make it. We prefer the malic acid over the lime (citrus). For the best 'salt & vinegar' pork rinds or chips just shake some malic acid into the bag. It's becoming a staple in our kitchen.
We use msg the same way.