The reason why you see them built up in the high income zip codes is because branches are almost completely out of the business of regular teller operations of

The reason why you see them built up in the high income zip codes is because branches are almost completely out of the business of regular teller operations of years ago which as you correctly point out have moved largely online. Instead branches exist to move high margin services and wealth management product to high income customers. That isn’t to say the big banks don’t have a real estate problem - they do but it’s more the back office than it is branches.