Re: I've figured it out...
But the same thing explains quantum physics. There's no need to compute if Schrödinger's Cat is dead or alive unless somebody can be bothered to look.
How long does the compiler delay the computation of the original quantum state if the chain of decoherence doesn't matter to someone for millennia? At what point is it more efficient to simply carry out the computation and deal with the result rather than store the situation and only resolve it and all the things it affects when they intersect with the simulated awareness of a human being?
In other words, when does the cat start to smell?