If you replace "AI" with "self-driving" throughout the open letter [0] then it still makes a surprising amount of sense (and of course any the incoherent bits can be smoothed out by ChatGPT if you prefer).
However I doubt Musk would have signed that version...
>[…] though new names should be treated with caution as there are reports of names being added to the list as a joke (e.g. OpenAI CEO Sam Altman, an individual who is partly responsible for the current race dynamic in AI).
Or, impossible I know, there are more than one person with the name "Sam Altman". Would suck probably, no one believes you are you, because another startup/tech-famous person have the same name.
When I checked yesterday I believe the signature said OpenAI CEO Sam Altman, so it was definitely a joke signature, not a case of two people having the same name.
However I doubt Musk would have signed that version...
[0] https://futureoflife.org/open-letter/pause-giant-ai-experime...