If the "enemies" complain the energy cost due to PoW
I'm just dropping this here, because it's relevant: Complains don't matter. Actions do. We're perpetually debunking this environmental propaganda years now. They don't have counter-arguments to most of our arguments. Switching to another mechanism (theoretically, I know) because of these complains is not going to happen, because we're already dealing these with strong arguments.
True, but there are new revenue source for the miners by selling their storage and computation.
What does this have to do with miners' steadier income?