car company != software company. Building a car gets you approximately 0% closer to knowing how to make a safe software driver. Writing AV software is exceptionally hard. We only have 2 safe functioning drivers presently: humans (debatable) and Waymo. Apple spent $7(?) billion and gave up. Uber and GM have also set billions on fire with nothing to show for it. Tesla might get there, but it could still be 5 years away.