Tesla's autonomous stuff is the most prominent in the media. It's not at all obvious that this translates into any sort of technical advantage.
The idea of taking an incremental approach has been abandoned by every serious player except Tesla. Musk is more interested in sizzle than steak. Selling cars and keeping investors excited near term seems a bigger priority than being ready for the day L4 becomes a real thing.
Properly validating a fully autonomous car isn't a sprint, it's a marathon. Tesla is acting like a hare, but I'm betting on the tortoises.
Funny you should say that. On the track a Tesla behaves the same way.
Here's a track test where the P85D falls flat on its face before even completing a single lap. The Tesla winds up being comparable to a Jeep Grand Cherokee SRT8. http://www.carscoops.com/2016/09/the-tesla-model-s-p85-makes...