Asiana 214 [0] is a classic example of crashing a perfectly good airliner into a seawall on landing.
In the Boeing 777, one example of the (auto)pilot interface showing safety critical information is the stall speed indication on the cockpit display [1], warning the pilot if they are are approaching that stall speed.
Hopefully Tesla will optimize the autopilot interface to minimize driver inattention, without becoming annoying.
[0] https://en.wikipedia.org/wiki/Asiana_Airlines_Flight_214