Tesla driver using autopilot killed in crash

My understanding is that current Teslas primarily use cameras for collision avoidance and radar only for short range stuff, parking, etc.

This will probably change now.

the tesla S uses a combination of radar, cameras, nd proximity rellays. Radar cant locate the source very accurately and cameras cant tell how close you are. A proximity relay starts the "panic cycle" since it uses HF sound and light

Which system are you saying was responsible for detecting approaching objects like the semi when at hiway speeds? A combination yes, so did the radar fail? HF sound is usually short range.

Of course Tesla's user guidelines makes the driver's eyeball the primary system.

A combination of AI and Human "I" will always be the safest combination, as long as the AI contributes and doesn't supersede.

I have no idea which or whether any system failed. All I said was that the TEsla S uses an integrated combination of the three systems. A boat uses radar , sonic sounding, and GPS, and still depends on a pilots skill at navigating by sight and sound (USe of lighthouses and view, water color and currents). What do you use in a plane in IFR? even when a bigass one is totally flying by wire, the pilot is there to make the final decisions.

As far as the S, Nobody is left with a belief that they can go into the "back seat" and watch a flick. Thats just wrong-headed

If a yeti flung itself off a cliff onto a moving vehicle ((Autopilot or not) there would, potentially, be a serious road-traffic-accident.

Question is - Wherein lies fault?
Yeti-behaviour?
Proximity of cliff to road?
Autopilot inefficiency in dealing with mad yetis?
Driver error?

Accidents happen.