I don't know the usernames of people discussed in articles and prefer not referring to people colloquially.

And I had assumed that you meant formidable in a positive sense. To me, he seems like a manipulative grifter. We even see that in his response to being fired. Instead of discussing facts, he was trying personal power plays, manipulating the media and employees, and trying to simultaneously start a new company, get a new job at Microsoft, and weasel back in as CEO of OpenAI. That seems to track as someone only concerned with himself.

Through all of this, it has remained confusing and disturbing just why he is considered so important to any of this. He seems completely replaceable. I haven't ever read or heard anything from him that didn't seem to come from some startup 101 playbook, almost like a cosplayer.