Ilya may still be someone who should be on the board... Especially given his role as head of alignment research. He deserves a say on key issues related to OpenAI.
People get excited. Stupid things happen. Especially in startups.
ChatGPT having become so successful doesn't change the fact that the company as a whole, is fairly immature still.
They should seriously just laugh about it and move on.
Let's just say that Ilya had a bad couple of days, and probably needs a couple of weeks of vacation.