Ooh, we’re not at the speed of light as a limit yet, are we? Do you mean “point A to point B” on fibre, or do you actually mean full on “routed-over-the-internet”? Even with fibre (which is slower than the speed of light), you’re never going in a straight line. And, at least where I live, you’re often back-tracking across the continent before your traffic makes it to the end destination, with ISPs caring more about saving money than routing traffic quickly.