It's hard to justify when Ethernet is catching up. Most new motherboards have a 2.5G port. High-end motherboards have 10G Ethernet ports. SFP cards take space, are ugly, and need directed airflow to stay cool. They are not worth it for a 4x increase in bandwidth at best.
I see how sloppy some FTTH installs are and they all work fine, and this is for light that travels for long distances.
The only advantage copper has is PoE.