It doesn't have to be vinegary either.
You can braise it with apple slowly for hours so the apple kinda dissolves. With nutmeg and cinnamon and a load of butter. Lush.
I do a thing with stewed red cabbage, apple, red onion, ginger, lyme juice, pinch of salt and a splash of rice vinegar. TBH it varies every time I make it. I think I put a few fenil seeds in once too as I was having it with pork.