KBW Online banking is all the rage. But that doesn't mean bank branches have been rendered irrelevant. Bank of America's mobile customers reached 22.2 million in the first quarter of 2017. And JPMorgan, which boosts 27.3 million mobile users, is making a number of investments in digital banking. But according to a recent note penned by equity analysts at Keefe, Bruyette & Woods, Inc, the New York-based investment banking firm, the total number of US bank branches is down just 3.5% from peak levels.