Leave it on?

@mylogic I suppose you believe that oil is bad, but you would not have an audio system without it, even if you use solar power.

Invalid question above

Oil is okay with no other choices.

Coal was okay before oil (dirtier and less efficient than oil)

Wood burning fires since the dawn of man and out of necessity were okay (new wood burning fires installed in the home by choice today, not such a good idea)

Going forward it is a question of using less carbon fuels, and everyone is capable of contributing to a solution.

Choices that can be made today. 

@mylogic  many thousands of products are made from oil, how much do you think all those products will cost if we aren't using carbon fuels? 

@invalid 

As l said, oil is okay with no other choices. 
 

Your last question to me in unanswerable.

I never turn off my accuphase integrated or my aurender streamer, as recommended by the manufacturer. The only piece I turn off is my Manley tube preamp to preserve the rather expensive tubes. I leave my simaudio amp in stand by all the time. I’ve been told the constant cycling is bad for the power switch and the capacitors. I’ve never had any problems with my equipment.