[bluGill]

Fair, but the counter is eventually you have enough real world testing to have confidence and so you no longer need the assert. If 1 in 10 user's have a crash that is unacceptable. However, what if it's only one in a million, or one in ten billion? At what point can you say, 'it's no longer worth worrying about that rare case.'

And this is why games are different from medical devices. In medical devices, I would worry anyway. In games, especially in a tight loop, it may be that extra CPU instruction is an important difference in performance.