Idle computing capacity that installed, online, but is not being used all the time is exactly what I thought the OP was talking about and calling spare. They said computing power to spare, not space or equipment. I don’t understand your argument about installing equipment, that to me isn’t what OP was talking about. 🤷♀️ Kinda like the spare capacity that CompuServe had from their time sharing service that they used to bring their online service to the masses at night.
Sorry you didn’t appreciate my reply. I was trying to explain my point with real examples from my experience. I don’t need your validation. I kinda regret trying to make you see both sides now. But whatever, you do you.