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> which was never done

Highly doubt that.

Oh, and when I see a phrase "millions of things interacting" and don't see a word "GPU" anywhere I feel strange. Just saying.

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Assuming that he is talking about a city sim as a game, I can understand that he doesn't want to use the GPU for the simulation, since it will be occupied with the (even more expensive) rendering of the city.

That and that I really want to avoid having to debug GPGPU code for the main simulation. But I'm not saying it won't become GPGPU at some point!

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