If you could leave your company and start a new one, what would you do differently? Many daydream about this, but Nick Fahy, CEO of Cynergy, has gotten a chance to do it. Fahy previously worked as COO of Bank of Ireland, managing director of its Northern Irish business, and managing director of its UK distribution business.  More than maybe any other industry, banking is hemmed in by the way things have always been done. That’s because even though bank’s core systems are decades old, they can’t be ripped out and replaced. Replacing the bank’s old systems runs the risk…