"I think computronium is a spurious concept. Matter, just as it is, conducts outlandishly complex chaotic quantum computations by dint of sitting around. Matter isn't dumb. Every particle everywhere and every when computes at the maximum possible flop. I think we tend to very seriously undervalue quotidian reality. Turning an inhabited planet into a computronium Dyson shell is comparable to filling in wetlands to make a mall, clear-cutting a rain forest to make a destination golf resort, or killing a whale to whittle its teeth into religious icons of a whale god."