Maybe there is some justification for Microsoft's design decision, but two undesirable side effects are that: 1. It angers power users who want their computer

Maybe there is some justification for Microsoft's design decision, but two undesirable side effects are that: 1. It angers power users who want their computer to retain their workspace's context, which is often easily lost between reboots. 2. It reduces Windows' usefulness as an OS on which to set up and run long-term processes, especially ones with real-time sensitivity, since Windows may decide to reboot itself at some unpredictable point in the process.