My mom used salt pork in beans when it was available. I have a hard time finding it, but you're right. It is excellent in pinto beans. You still need the roux to season the beans at the end though.
You can’t make baked beans *without* salt pork.
We used to have fried salt pork sometimes too. Always with white gravy and sometimes with succotash. Hated it.
Now a days I buy can beans, add molassas, a little brown sugar, some mustard, chopped onion stir and bake. Tastier than just canned beans..and easy...