You mean the stuff about a year ago that someone had managed to extract the secret with some crazy apparatus when having physical access? (can't remember if it was X-ray laser or what it was - expensive thing anyway)
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That is just the surface. The SEs they have used are in general insecure, lack any security certifications, and the Coldcards are vulnerable to many supply chain attacks that I have not published yet.
Modern attacks with the same method you mentioned btw would cost at most $2K with a DIY setup.