If this is true, it has an interesting application: you could control the utility weight of a simulation nearly independently from it's behaviour, by having it deterministic except for a large input for random data in it, and switching the sourced of that randomness between a pseudorandom number algorithm and quantum randomness. Obvious example would be an upload of you which is deterministic and non-branching when experiencing unpleasant things, and massively branching (much more so than your biological brain) when experiencing pleasant things.