I think you're conflating posts.
He posted that search result in an effort to say the optical cable was inferior and unable to match the data rate of coax.
And he will die on that hill now, just like the nerves in bones hill, just like the mathematical averages hill, just like the Real Price hill, just like the Trumpcession and Trumpflation hill, just like the oil sold from the SPR hill, just like the definition of verbatim hill, just like the definition of irony hill, and so on, and so on.
It was following his attempt to belittle me for having a stock head unit (which is on a shelf in my garage after being replaced with a Pioneer years ago), and it turned out HE was the one with the stock head unit (and a portable DAP plugged into his stock head unit USB port).
AI gives the same info but it is wrong, as evidence by Toshiba (creators of TOSLINK) and MANY other companies in the audio industry.
He is as confidently incorrect as a person could be, and will maintain it until he is dead.