Honestly very confused by how it can be a mainstream condiment/dressing. For me it’s just acidic. Doesn’t really taste of much but sorta tingles on my tongue/throat. Sorta like when you burp up a little stomach acid or a milder version of when you throw up stomach acid. Very confused about salt and vinegar chips and any sort of vinegar based salad dressing.
Vinegar is a great backup flavor. Sweet, Salty, and Sour add a lot of complexity and when something tastes lacking one of those will probably help.
However they are all easily overused. If the first taste impression of food is one of them it’s over seasoned.
Try a few drops of good vinegar in a gravy to make it pop.