[logicallee]

Are you kidding! Of course it matters!! If it's a VM, we can start hacking it, until we find the universal equivalent of a buffer overflow or some kind of edge case branch mispredictoin, and can start injecting our own payload. After a little bootstrapping, and experimentation that hopefully doesn't crash the VM, we are now running whatever physical laws we want. Matrix time!

[vbezhenar]

Or some watchdog system will detect an abnormal behaiour, stop the simulation and report the bug to the developers. They'll fix bugs and run the simulation from the last non-corrupted backup. And we'll never know that someone did that.