And the fact that Emmett is only interim should give you a hint something is up.
Kyle's story was brewing from the moment GM appointed their attorney to manage Cruise - everyone knew there was gonna be restructuring of the executive team after the incident.
If anything, it was a convenient time for Kyle to step down as it wouldn't get a lot of prime time thanks to OpenAI drama.
That they didn't complete the process of a permanent CEO over the weekend after firing and then negotiating with Altman?