[tveita]

Moore's law is in effect right now, and yet mining keeps getting more expensive.

The exact number of hashes per joule is irrelevant since the work being done isn't useful. This is purely a competition about spending the most. If hashes get 1000 times cheaper, they'll do 1000 times as many.

[pests]

So maintaining the integrity of the blockchain isn't useful ?

[tveita]

Mining 1000 times more hashes doesn't maintain the integrity any better than the current situation.