Heh, clever. In a sense, iron has the highest entropy (atomically speaking) of any element. So if you take the claim that an aspect of solving intergalactic optimization problems involves consuming as much negentropy as possible, and that the highest entropy state of space time is low-density iron (see schminux's comment on black holes), then Clippy it is. It seems though like superintelligent anything-maximizers would end up finding even higher entropy states that go beyond the merely atomic kind.

...Or even discover ways that suggest that availability of negentropy is not an actual limiter on the ability to do things. Does anyone know the state of that argument? Is it known to be true that the universe necessarily runs out of things for superintelligences to do because of thermodynamics?