I don't know what physics you refer to but nothing in the universe as I understand it "lacks entropy".

A vacuum is one example.

On top of it being 'set it and forget it', it also promotes automation by design.

The engineering and research quest to produce smaller and smaller transactors is not capable of being automated. It requires the random occurrence of ingenuity. I am not going to write a treatise on this here.

The logical way efficiency is increased is by cost reduction of the business operations.

For mining it is mostly all about the electrical efficiency of the ASIC chips.

Once the ASIC is built into the Intel CPUs

These can never be even orders-of-magnitude as efficient as the dedicated, state-of-the-art ASIC chips.

But you do realize due to physics we will reach a maximum efficiency for chips pretty soon.

Malthusians never defeat human (nature's) ingenuity.

Paradigms will change as necessary, e.g. quantum computing, etc.. The ingenuity race will not cease.