Why did the Tesla not automatically brake in time? Even if it wasn't driving it should still have automatic braking for collision avoidance?
There is an alarm, presumably a collision warning which responds quite fast to the car in front braking, but clearly it's useless for avoiding the accident as you don't have time to respond to it.
The distance between the vehicles appears to be under 1 second - stupidly close. Again, why did the Tesla not enforce a more reasonable distance?
And finally, a car that can do 0-60 in under 5 seconds should have brakes capable of stopping faster than a big heavy SUV, by the time the Tesla stopped it was actually in front of the SUV, a whole extra second of braking time!