Or, to say it another way, they are cooperating with OpenAI - OpenAI uses Microsoft's cloud services, and Microsoft incorporates OpenAI's products in its own offerings. But the worries people have are not about OpenAI's products suddenly vanishing, it's about the turmoil at OpenAI affecting the future of those products.

Actually the exodus of talent from OpenAI may turn out to be beneficial for the development of AI by increasing competition - however it will certainly go against the stated goal of the board for firing Altman, which was basically keeping the development under control.