Well, actually it poses a lot of problems. Communications that have back-and-forth transfers can be very slow. For instance, if I wanted to do a distributed c

Well, actually it poses a lot of problems. Communications that have back-and-forth transfers can be very slow. For instance, if I wanted to do a distributed computation with a server on the other side of the world, it would be limited by the speed of light. From where I am to Australia is about 48 ms. So if I want to communicate there and receive a reply, that's about 1/10 of a second right there. I can only do that 10 times a second then. Not so good. Not to mention the Mars mission has to wait anywhere from 8-19 minutes to get data between earth and the rover. We could certainly use > c if it was possible.