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This Is Why Tesla’s Stainless Steel Cybertrucks May Be Rusting
(www.wired.com)
This is a most excellent place for technology news and articles.
I think the original idea was the stainless steel would provide a rigid exoskeleton so the vehicle could save weight/space on internal structural support, but in the end they still needed similar internal structural supports so the insistence to retain the uselessly heavy/expensive steel panels was probably one of Elon's classic strokes of genius.
It’s hard being a misunderstood genius. Especially if the part that’s misunderstood is that you possess virtually no genius.