If you want to compare between fiber optics and cable networks then fiber optics would always win the race because of the various advantages it has for its users. One of the biggest areas where fiber optics has helped people is in the electricity department. In the cable networks the operating data network had to rely on the transmitting signals but in the fiber optics there is no such dependence. It is also cheaper than the cable networks.
In order to upgrade the hardware of a computer it is important that you have a sufficient metal cable which is only possible with fiber optics. If you compare the performance of fiber optics with cable networks then you will see that cable networks require lot of wiring to set up while fiber optics hardly require any wiring. The traditional metal networks help in the compression algorithms which in turn help in the working of the fiber optics.