Also keep in mind that Microsoft hasn't actually given OpenAI $13 Billion because much of that is in the form of Azure credits.
So this could end up being the cheapest acquisition for Microsoft: They get a $90 Billion company for peanuts.
[1] https://stratechery.com/2023/openais-misalignment-and-micros...
To be clear, these don't go away. They remain an asset of OpenAI's, and could help them continue their research for a few years.
Almost certainly not. Remember, Microsoft wasn’t the sole investor. Reneging on those credits would be akin to a bank investing in a start-up, requiring they deposit the proceeds with them, and then freezing them out.
If tomorrow it's Donald Trump or Sam Altman or anyone else, and it works out, the investors are going to be happy.