Pretty funny what goes around...lol
Back in the 90,s we were using fiber optic comms for industrial usage, I liked it a lot as no noise, the "wiring" could be routed anywhere even 360 degree loops etc with zero issues.
The programmers say it did not allow enough heavy duty information exchange as Profibus and then later Profinet so we ditched it and moved on.
Canbus that you now find in cars( for a few years actually) was basically Profibus that we started with in the late 90,s, early 00,s . Profinet is really just a variation of ethernet.
Now it is showing up as the latest audio "darling"
Pretty interesting tbh.
Good luck.