Mr. Jackson does a really good job of addressing the psychology that holds many businesses captive when contemplating upgrades.  He offers some practical insights to combat resistance and some winning perspectives to help failed deployments get over lack of momentum, or the obsession over an unachievable level of perfection – a must for the non-technical and technical alike contemplating a platform migration.  He even does some very basic math that shows the conventional wisdom of "testing everything" isn't just unwise, it is flat out bad business.