Don't modern operating systems turn off the screen after X period of inactivity by default? And the screensaver kicks in a bit before that? I may be wrong... B

Don't modern operating systems turn off the screen after X period of inactivity by default? And the screensaver kicks in a bit before that? I may be wrong... But turning the screen off/on takes a few seconds and is annoying if it accidentally happens while you're reading or watching something. A screensaver is a good visual cue that can be easily reversed by shaking the mouse. Ultimately users can set them to whatever they want. What's the problem? There's always a trade-off between convenience and energy savings. Turning the display off still takes a few seconds, so does recovering from sleep or hibernation.