I just saw Linustechtips put up a new VIDEO on the new Corning optical thunderbolt 3.0 cable. It’s priced at $360 for 5 meters and $480 for 50 meters. The neat part is that it’s optical, so emf can’t affect it. The main cost contributor is the manual labor portion due to the high level of care needed to assemble the ends.
I think this is super rad and can’t wait for it to become more widely used.
Edit: correction. Thunderbolt only.