Fair, but you can’t do 12v ethernet like they’ve done with 48v. The cables would be too big
So unlocking 48v allowed the change which allowed lesser cabling.
Tesla claims it’s 77% cable reduction and 50% copper.
Edit: also Teslas wiring harnesses have been smaller than industry standard for years. If others made the switch and moved to an etherloop as well, the copper savings would be even bigger than what Tesla experienced.