This is how all tech works - trains, cars, power stations. We build things that are initially inefficient. We eventually transition to energy efficient tech. We celebrate. It’s rare the transition can reduce 99.95% of energy footprint the size of a country within a minute of activating the new tech.
The difference is that PoW is not "inefficient". Rather, it is intrinsically wasteful by its very nature.
Take an inefficient car for instance. There are diminishing returns in its utility after a certain point of energy use. On the other hand, there are no diminishing returns in PoW. The more energy you use, the more money you make.
Sure? It was both an inefficient and wasteful mechanism to secure consensus. This is why developers have been actively researching and developing how to switch Eth to PoS for years.
Electric heaters are the classic exception in energy efficiency calculations. The heat produced is only wasted in that it will eventually dissipate. But heat is exactly what you wanted when you turned the heater on, and so heaters are often described as 100% efficient. I guess with heat pumps this logic makes less sense. It is more efficient to move heat around than to generate it.
Not quite sure how this relates to Proof of Work. People don't generally run mining rigs because they want to generate heat. The heat is almost always waste.
I've always wondered if the economics of using CPUs in heaters to do something useful and generate heat would ever work out.
Trains, cars and power stations serve a purpose. The blockchain only creates waste with nothing in return. Yeah it does pollute less now, but it's still too much.
