A lot of cables, other than ethernet, which are available in consumer products but are on the higher end of data transmission specs for 2021-2022... are able to

A lot of cables, other than ethernet, which are available in consumer products but are on the higher end of data transmission specs for 2021-2022... are able to meet these specs at lengths greater than about 6-12 feet (e.g hdmi 2.1+ or usb 3.1+) by very likely doing electrical to optical conversion, transmitting over an optical cable then converting back to electrical. This is especially true at the 15-20+ feet length. If you've looked for the highest spec long length HDMI or USB cables you've probably seen the price jump somewhat significantly (from about $15 to $60-80+) when you hit a certain cable length. The ones that are long length but cheaper have many reviews stating they have failed to meet the data transmission rate, because they're not using the optical conversion technique and the ones that use it certainly cost more and are way more reliable (or simply aren't falsely advertised to be able to do something they can't, which is what the cheaper longer length purely copper cables tend to be). With optical on the interconnects, you eliminate cross talk, parasitic capacitance, you reduce heat due to electrical resistance. It clearly does have its advantages. Just like chiplets and other design techniques that have become popular due physical constraints, optical will very likely one day too have the investment it needs to replace copper interconnects due to being worth the cost of investment by providing an advantage over them.