as you can check around, I'm focused on network security (difficulty) regression

because decreasing security will erode Store-of-Value (purchasing power of Bitcoin) , what is advertised as the one of most impotant Bitcoin features/properties...

And potential other consequences - like for example if there is only 25% of network hashrate of the past ATH, and rest 75% of ASIC hardware is idle and ready to use, who knows if not in a malicious way - that's only another, additional consequence here. 

jk_14

But how a miner that went out of business because they can't maintain operations (because electricity costs, employees costs, maintenance of equipment, upgrade to new technologies, etc.) can attack a network of miners that are still in business and CAN maintain operations?

bitcoin

"If all the people around tells you that you’re drunk - maybe you're just drunk"

Maybe I'm not as smart as you.
But how a miner that went out of business because they can't maintain operations (because electricity costs, employees costs, maintenance of equipment, upgrade to new technologies, etc.) can attack a network of miners that are still in business and CAN maintain operations?
It doesn't make any sense to me. 