That OpenAI would absolutely dominate the AI space was received wisdom after the launch of GPT-4. Since then we've had a major corporate governance shakeup, law

That OpenAI would absolutely dominate the AI space was received wisdom after the launch of GPT-4. Since then we've had a major corporate governance shakeup, lawsuits around the non-profit status which is trying to convert into for-profit, and competitors out-innovating OpenAI. So OpenAI is no longer a shoo-in, and Microsoft have realized that they may actually be hamstrung through their partnership because it prevents them from innovating in-house if OpenAI loses their lead. So the obvious strategic move is to do this. To make sure that MS has everything they need to innovate in-house while maintaining their partnership with OpenAI, and try to leverage that partnership to give in-house every possible advantage.