This is not true. First of all, our cosmological models are constantly being updated. There are a ton of unknowns here and we cannot be certain in the heat dea

This is not true. First of all, our cosmological models are constantly being updated. There are a ton of unknowns here and we cannot be certain in the heat death outcome. Second, even if the canonical heat death model is right, the minimum required energy usage to sustain thought / simulation will go down as the CMB redshifts to zero temperature. It is unclear at this time which factor decays faster: available energy or cost per compute. Effective lifetime may be unbounded.