
Microsoft left its observer seat on OpenAI's board because it saw significant progress in the company and felt confident in its direction5. Microsoft no longer saw the need for the non-voting seat.

Microsoft stated that it had seen "significant progress" in OpenAI and was confident in the company's direction, therefore it no longer saw the need for the observer seat3.

No, OpenAI will not have any board observers after Microsoft's departure. Microsoft's decision to leave the observer seat on OpenAI's board came as a surprise, but the company has expressed confidence in the direction of OpenAI and the progress made in the AI industry. With this change, there won't be any more observers on the board, likely ruling out reports of Apple gaining an observer seat1.