We already know about the cabin camera and its ability to track the driver's eyes. Why doesn't Tesla use this to eliminate the need for drivers to keep their hands on the wheel?...
Initially, the idea of Tesla cabin camera was not Autopilot/FSD related. It was to monitor passengers of Tesla Robotaxi. If there's no human driver, there's no need to monitor a non-existent driver.
However, as there are more public pressure after numerous cases of accidents and deaths, Tesla decided halfway that it is doing it for safety's sake: Turning the function of monitoring passengers into monitoring human drivers.
Halfway because even Model 3 and Y has a cabin camera but it is blind when the cabin is too dark (there's no roadside lights).
Halfway because now the S and X have a cabin camera with infrared to work in complete darkness but that is not still the case of old and brand new Model 3 and Y that lack infrared LED lights.
A working cabin camera in complete darkness is not new as other brands have done it. Even cheapo brands like $1,999
OpenPilot can.
But to be hands-free, the steering must be stable enough to trust the automatic steering without human intervention.
Tesla's AutoSteer is not stable enough since it first sold AutoSteer version 1 in 2014 and AP2 in 2016 and now we are in AP3 in 2022 with FSD beta.
It is not stable enough because, in the past, it would drive straight into a cement median if the driver didn't intervene (
the driver didn't and died of course).
Today, the FSD beta is still not stable enough because it might just steer into obstacles like pedestrians, bicyclists in the city, and of course, the
famous collision with the green bollard).
But why?
When GM sold you a hands-free Super Cruise in 2017, you got hands-free as advertised. Notice it's only hands-free in areas that have been HD-mapped (most major US and Canadian highways or 200,000 miles in 2017 and 400,000 miles by the end of 2022).
Maybe it is harder for Tesla to attain hands-free because Tesla hates to "game".
Tesla believes in the generalized FSD. Others rely on lots of homework like HD map for a route and maybe Tesla doesn't feel it should stoop so low to game its way to the Autonomous Vehicle challenge.