I'm quite surprised that this point is not being made more. It's not like MSFT is the only shop that OpenAI can turn to, and you could argue that what will now happen is a full scale lobbying war will be now be waged by OpenAI backed by others who don't want MSFT to win (Goog? Musk?). Could be that OpenAI's principled stand will "win" regulation and MSFT will be in a very poor position.