Digital transformation demands that CIOs focus on their business technology (BT) agenda to win, serve, and retain customers. Most will have legacy applications — and underlying technologies — that can't make the leap to support a customer-obsessed business model. But many CIOs lead their industries' move to digital businesses even while retaining older technologies. They understand what to migrate and how fast to move. This report helps CIOs build a strategy to support what promises to be a never-ending digital transformation.