Quart jars have their place. It would be difficult to put up dill pickles in a pint jar. That said, I remember when my mother put up scores of quart jars of vegetables and fruit..early on it was a wax seal. Once in a while, a jar didn't seal right, and we lost a quart of peaches. Better to lose a pint!

Another consideration is how much you would need in a recipe. For example, you would probably need more than a pint of tomatoes to make chili or spagetti sauce...might as well put them up in quarts.

Fish, meat, apple butter,jam etc would be better in pints. I make my own maple syrup and I put it up in jelly jars.