I agree that no one is ever going to run any ancestor simulations in our world. When Bostrom made his argument he accepted that this was one possible conclusion from it. I think it is the right one.
That does not mean there are no simulations at all. As one example Walter mentioned, novels are simulations of worlds, but very different worlds. And likewise, there is no proof that we are not contained in another very different world that differs from our world as much as our world differs from novels.
I agree that no one is ever going to run any ancestor simulations in our world. When Bostrom made his argument he accepted that this was one possible conclusion from it. I think it is the right one.
That does not mean there are no simulations at all. As one example Walter mentioned, novels are simulations of worlds, but very different worlds. And likewise, there is no proof that we are not contained in another very different world that differs from our world as much as our world differs from novels.