We once had an inquiry for a 8.5M version of our reference speaker cables. We recommended against it. We would have had to customize it and add more strands for a couple of reasons.
the fluid metal has a low resistance compared to some other non wire materials but still high-ish. Thus, in order to made sure the cable had low enough basic resistance, well, next to impossible for that length. We urged them to go for a long IC and far far shorter speaker cables.
due to the high internal resistance of the fluid, beyond a certain point, in lengths, it becomes pointless to pursue the higher fidelity that the fluid metal brings (superior electromagnetic expression compared to wire).
The sticker shock on that proposed 8.5M reference custom speaker cable, would have been a jaw dropping $285k US. We said we’d make it but we’d not guarantee its function and would accept no returns. That they experiment would be on them. Again, we recommended against it. If it did not work as desired, it could not be chopped up into cheaper ones and re-terminated. This is fluid metal. Each cable is a permanently set piece.
This inquiry was the standard partner issue of having to hide the equipment and wires to make it acceptable to the domicile and partner...but playing out at the Hong Kong Billionaire level.
I would have loved to have made it for the one single thing: The most expensive speaker cable ever made, hopefully. Just... because.
To give you an idea, the construction of the cable in review, is an attempt to get past the electromagnetic problems of solidus metal wire. As is all wire configuration and design parameters in the high end speaker and interconnect world. Every single one of the cable designers out there are struggling with electromagnetic expression and integration problems of solidus wire. Everything they talk about, deal with, use in advert text (cut away images, etc), white papers and so on, deals with this problem.
The fluid metal does away with those problems intrinsically.