(or even Ethernet)

Technically, those 100+ Gbps fiber LAN/WAN connections used in data centers are also Ethernet, just not twisted pair.

That said recently I was in a retail store and saw “Cat8” cables for sale that advertised support for 40 Gbps copper ethernet! I wonder if any hardware to support that will ever be released. It is a real standard, approved way back in 2016: https://en.wikipedia.org/wiki/100_Gigabit_Ethernet#40GBASE-T

Most residential fiber globally currently is GPON with a 1-2 Gbps shared line using passive optical splitters, split up to 32 ways. Raising that shared line to 50 Gbps is a great upgrade.