The usual counter-argument is the operational burden, but human capital is also a relatively fixed cost. A dedicated team of 3-5 FTEs could probably handle inference ops for a F500 company.
Meanwhile, the capability delta is shrinking fast. We have more evidence that local open-source is viable with the release of DeepSeek v4, and the industry is only trending further in this direction. Especially as we rely more on test-time compute and task-specific harnesses rather than model size.
So, if you're an executive looking at a marginal but fixed operations cost, added flexibility, and a rapidly closing gap in capability, why wouldn't you just run open-source models on your own infrastructure to get those highly predictable costs? Plus, you decrease the risk of one of the frontier