I do not subscribe to that philosophy. Many devices today have a standby or remote IR sensor so they are "on" sort of. And if they have a mechanical switch I use it.
My main set up is all tube and that is only on when I'm listening and have time to listen for a few hours
My second system is Solid State and has a full function remote. Plus it has Auto Off so I let it do that when there's no signal for 20 min . Either way it's " off" when not in use
If it's got an I.R. window its always on .