Traditional banks — venerable financial institutions housed in imposing stone and marble — are swiftly becoming a thing of the past. Customers are increasingly looking for friction-free ways of conducting their day-to-day banking, relying on online or mobile solutions to their banking needs before they resort to a physical branch. And where they can’t do what they want to online, customers are voting with their feet — of the people who switched banks in 2011, 32%* did....