Honestly, the current general state of software may be a good proxy for what AI will settle to. I can imagine major open-source models, trained and generated by nonprofit efforts in a roughly similar fashion to Linux. Entire businesses might be built on top of "servicing" this model, such as enterprise-grade finetuning, serving, etc. Like the author mentioned, no business wants their core functionality to be dependent on external factors. As I understand it, this is also the case for some Linux-based corporations that focus on building a business around open source software. Of course, there will be proprietary models. Will the average home user cook their own custom distro of LLaMA 10 to be their home assistant? No. They'll probably use Alexa or whatever proprietary solution is out there.
Uncertain, but I'd be willing to be that open source AI will win the way Linux won. In the ways that it matters.