"When not used" -> hardly ever happen. I just close the cover and let the magnets switch off the screen. The few hours in night time it's "sleeping" beside me.
Do you really fully switch off ? Is that even possible ?
It saves barely any battery life unless you get lots of notifications which light up the screen all the time. And well, that "give the components some rest"-argument... I don't know what to say to that. The idea of an iPad is that you can pick it up anytime, immediately slide to unlock and do what you gotta do, so if you think about it, the iPad is made to be in stand-by (and not to be turned off).Yes, i do switch it off.
beside, it saves battery life and the components could get some "rest"