There's no reason to think the computation is "happening" anywhere but our universe, or even "happening" at all in any real sense. Light follows a geodesic. At

There's no reason to think the computation is "happening" anywhere but our universe, or even "happening" at all in any real sense. Light follows a geodesic. Atomic reactions tend to minimize energy. Rivers follow the most efficient path to the sea. Where does any of that computation "happen"? Why is it any stranger that an electron "knows how" to follow a gradient in an electric field than that a quantum computer "knows how" to perform a random circuit sampling?