In relation to other comments here. There is "coding" and there is "God's spark genius of algorithms" kind of work. This is what made the magic of OpenAI. Believe me, those guys were not "just coding". My bet is that it could be all about some research directions that were "shielded" by Sam.
They just hadn't -- and still haven't -- figured out how to commercialize it yet. I don't think they'll be the ones to crack that nut either. IMO they are too obsessed with "safety" to release something useful, and also can't reasonably deploy a service like ChatGPT at their scale because the costs are too high.
With OpenAI imploding this whole race just got a lot more interesting though...