Vista broke many XP applications, and customers (particularly enterprises with legacy software) avoided this by not upgrading. Now Windows 7 will be compatible

Vista broke many XP applications, and customers (particularly enterprises with legacy software) avoided this by not upgrading. Now Windows 7 will be compatible...with Vista, not XP. This doesn't really fix Vista's mistakes: customers who didn't upgrade are once again faced with having stuff break when upgrading Windows. I'm not saying change is bad, but why is Microsoft unable to grasp the idea of virtualizing legacy (especially with proven examples of this, such as Apple's Classic environment?). There is absolutely no reason to cause countless customer applications to break, much less to make them pay for the privilege of upgrading. Microsoft jeopardizes their revenues by again making Windows upgrades risky for businesses.