I’m not exactly sure on the “how” but it only makes logical sense for (non-AI) companies to band together to fund the training of a shared model. Apple is a great example, AI is not their core business but they still require it.
The only thing that took us down a different path is the vast sums of VC funding pumped into the AI companies.
It probably doesn't.
There's a reason we let companies specialize in some kind of service and buy it from them.
LLMs aren't looking like they'll be highly differentiated like software, so their market will probably be competitive. What negates the main reason Open Source software exists.