Fibre has its own challenges -- crystalline structure, IoR homogeneity, and polarization effects can affect the entire audio spectrum. I wish I could say it's better, but ultimately ju/st a different game.
fiber as an ethernet link is packetized and has error correction. 1Gbps and 10Gbps stuff is just OOK blinking LED on and off. Pretty hard to screw up unless you have a chipped ferrule/facing, dirt on the fiber, or dirt in the connectors.
I'm going to say turbo product codes
can we maintain high fidelity satire close to the shannon limit? what do the varying code rate waterfall curves look like for satire FEC on modern equipment?
The best I can think of is Hamming codes, because "hamming it up", but improvements would be welcome.