A complicated mix of Trade Secret, Patents, and Domain knowledge are the primary issues. I'm really hoping Boeing/Ford/GM/<big company that manufactures vehicle

A complicated mix of Trade Secret, Patents, and Domain knowledge are the primary issues. I'm really hoping Boeing/Ford/GM/<big company that manufactures vehicles>/Tesla will buy out a couple of the manufacturers and then open the market up. Sadly because of the aforementioned this is unlikely to happen as it would trigger anti-trust concerns, and AFAIK almost all the best firms are privately held.