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Passkeys Explained: The End of Passwords
(sentientrant.com)
This is a most excellent place for technology news and articles.
Or they're using it as intended. I've had more than one account I've gotten by cost sharing with friends. That's not a problem, that's a solution.
And it only takes one person with a grudge to cause a problem. I have seen it. I have shared accounts but very carefully and if someone abuses it then they permanently lose access to my stuff even if they are family.