That is why I specifically referred to the standard model rather than those other examples. Finite computational power is firmly established by Einstein's theory of special relativity. Of course my model of the universe could be wrong which is why we must continue to gain knowledge both individually and as a species. So my response is based on my current mental model and understanding of the universe as being finite (it will likely end in heat death), with energy conservation existing. Some have models of the universe where the universe is infinite but even in this case, in my opinion based on the universe we can observe it is showing itself to be finite.
This means a Turing machine is not physically possible and exists only as a mathematical abstraction due to the fact that there is no infinite memory.
References
- Bennett, C. H., & Landauer, R. (1985). The fundamental physical limits of computation. Scientific American, 253(1), 48-57.
RE: The Societal Complexity Explosion and Wisdom Asymmetry