As well as switching to 48V they are going to use Ethernet cables for most of it (PoE). So at the same time they get rid of the CAN bus wiring and have everything running on ethernet for communications and power, which means a LOT less wiring because with CAN bus every device needs its own wire but with Ethernet its much easier to have 'hubs' that channel communications and power on to other devices.

https://twitter.com/cybrtrkguy/status/1731658374775771297?s=...