Depends on how they’re inverting the power. If they’re sticking with the DC voltage straight from the panel, that’s probably one thick cable. If each panel or group of panels has an inverter to go to high voltage (AC or DC) to a central location, you can proportionally scale the thickness as voltage increases.
Not even a conductor at all, apparently.
https://arxiv.org/abs/2308.06256 this group (mentioned jn the article above) synthesized a fully pure crystal, and found that has a resistance in the several megaohms at room temperature. Just a purple piece of glass, functionally speaking. The thoughts of superconductivity was due to random copper sulfate impurities which DO conduct electricity.
There’s tradeoffs. If training LLMs (and similar systems that feed on pure physics data) can improve nuclear processes, then overall it could be a net benefit. Fusion energy research takes a huge amount of power to trigger every test ignition and we do them all the time, learning little by little.
The real question is if the LLMs are even capable of revealing those kinds of insights to us. If they are, nuclear is hardly the worst path to go down.