Powerful LLMs are so large that they can only be trained by the major AI companies. Even LLaMA 65B (where the open release was less than intended) can't compete with GPT-3.5, let alone GPT-4. And the price for the most powerful models will only increase now, as we have effectively an arms race between OpenAI/Microsoft and Google. Few, if anyone, will be able to keep up.

Linux is different. It doesn't require huge investments in server farms.