That's very relative. That never stopped us either when overcompensating with hardware. Now imagine some very advanced quantum computer (or something 10 generations after it) that can scale infinitely after you just run the big_bang.sh. Who knows, they maybe even make it more scalable an stable as it progresses, by some self-scaling optimizations, which always play catch-up with chaos.
You would still need some giant factory sized next-gen quantum computer but maybe that's just worth their budget, after extracting discoveries from civilization x or y.
I think the hardest part, if this ever happens, is to fast-forward just enough an cherry pick from gazillions of civilizations, all while hoping that they to not evolve quick enough to escape your quantum VM. This and maybe the part with shutting it down and becoming a destroyer of worlds.