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Elon Musk says 'we dug our own grave' with the Cybertruck as he warns Tesla faces enormous production challenges
(www.businessinsider.com)
This is a most excellent place for technology news and articles.
So here is some information on where the 48v standard is coming from. https://www.microcontrollertips.com/what-is-the-ideal-ethernet-choice-for-automotive-applications-faq/
it's new to Tesla but not automotive.
AFAIK Tesla is the first mass auto manufacturer to go fully 48v? Others are hybrid.