[cbkeller]

I was wondering about this latter point as well, and apparently this is exactly the goal if one could implement reversible computing at the hardware level [1]:

> One of the earliest proposals to reduce heat from lost bits was to make computer circuits reversible. A reversible circuit has exactly as many outputs as inputs, assigning one output pattern to every input pattern and vice versa. That means each input can be reconstructed from the output; no bits are lost, so reversible circuits will not give off heat from bit loss. Furthermore, reversible circuits can simulate standard logic functions and can therefore be used in any computer.

[1] https://www.americanscientist.org/article/computers-that-can...