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Even the Tesla Cybertruck's Brake Lights Don't Make Sense
(www.thedrive.com)
This is a most excellent place for technology news and articles.
I've read that it used to be done on purpose to prevent models meant for US to be sold in other parts of the world, and the other way around.
Conversions are not straightforward since on US models there's a single wire that goes to a single bulb and carries both the brake (steady) and turn (blink) signals, while in other places there's a distinct turn bulb with it's own wire.