Imposing global technological bans so willy-nilly seems like a nice idea only on the surface. Things like machine drying your clothes at home in the US (uncommon in Europe so seems frivolous) uses as much if not more energy. Others might consider gaming or self-hosted servers or who knows what else equally inefficient. Do you really want to put things so easily on the potential chopping block even if this one thing you hear a lot about might be a waste?
Now if PoW was using 10% of the world power maybe it'd worth it but I just don't see how you can justify such a ban but only apply it to this one thing.
Now if PoW was using 10% of the world power maybe it'd worth it but I just don't see how you can justify such a ban but only apply it to this one thing.