Get the current S7 or maybe future S8 and S9 down to half the power and twice the speeds would be amazing.
And then everybody will run 4 times as many of them. Most people mining are limited by their current electrical supply and heat logistics. When you come out with a machine that uses half the power, they just buy 2x as many new units to replace the old ones.
And think about this. What happens to all the older units that run at half the speed?
Somebody somewhere buys them for cheap and runs them. So now you just have a worse overall power use, not better. This is what is currently happening with the S7/A6 war.
And while eventually the oldest, weakest gear gets phased out, it will be brought back out to play if/when the price spikes. Making things even worse than ever. Remember that usually the gear is turned off before it breaks, so theres plenty out there.
Then there's the mountain (literally) of gear that will need to be re-cycled. But how many do that? And theres the cost of extracting all those metals from open pit mines and the effect on water quality.
I'm not saying were all going to hell, but we do contribute to some bad shit overall. Owning a few miners in your basement doesn't make you a bad person by any stretch. Somebody was bound to do this work once it became profitable to do so mind you. This is a capital driven planet and society. Nothing was going to slow this revolution down, digital money that is.