I agree that open source is usually better for everyone. I have read some articles about Elon and OpenAI, and how he was against their removal of their open source policy. Maybe he really believes in AI as open source, or maybe he wants to improve his PR, but in the end I think we as consumers/users benefit from this.
We will see what the truth is there. He did sue them claiming they went against the open idea. The company claims Elon was in on the switch to closed source.
Lawsuits can be messy things. But the think is that Grok is now open source so there is another on the market.