I used to work at a company that is very much involved in the field and you're right. I don't know any car manufacturer (and we worked with nearly all of them)

I used to work at a company that is very much involved in the field and you're right. I don't know any car manufacturer (and we worked with nearly all of them) that is interested in P2P. Even the ones that are willing to use and invest in an open communication platform will keep full control of the car to server communication, and proceed to share only a fraction of the collected data.