Found two other interesting comments under this article on Reddit:
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What could it be? Another real Ledger hacking story or an attempt by a scammer to foist a victim on expensive legal help that is unlikely to help him?
If it's a Ledger hacking story, we will find out about it sooner or later. If people start experiencing sudden and unexplainable coin losses, it's going to make the headlines.
I have no idea what that user wants. He claims there is an action lawsuit against Ledger going on and instead of discussing it publicly and sharing some information, he concludes by saying he will PM the user in private. Scammers usually like to "discuss" things privately. Of course, there are many legitimate reasons why you would want to talk to someone over PM, but we have seen many times how scammers try to take advantage of victims with additional scam attempts and fake recovery services. I would be very careful if I were that user who is about to get a PM.