I think Tesla would take exception to "none of it is trustworthy" (....drive up to the set limit or speed of car in front if lower, try to stay between 2 white lines). Mine manages all of those things on AP & hasn't failed in the 11 months I've owned the car..
The less trustworthy part is phantom braking - I've had a couple of unexpected severe braking events with a handful of other more gentle occurrences but staying alert & sensible use of AP with right foot always above the accelerator has avoided anything dramatic. Those places where phantom braking had occurred I don't use AP anymore, I've not experienced the joys of a flap happy lorry curtain yet & don't use AP in the dark.
Not sure they would take exception to be honest, the manual lists all these
WARNING: Traffic-Aware Cruise Control is designed for your driving comfort and convenience and is not a collision warning or avoidance system. It is your responsibility to stay alert, drive safely, and be in control of the vehicle at all times. Never depend on Traffic-Aware Cruise Control to adequately slow down Model 3. Always watch the road in front of you and be prepared to take corrective action at all times. Failure to do so can result in serious injury or death.
WARNING: Although Traffic-Aware Cruise Control is capable of detecting pedestrians and cyclists, never depend on Traffic-Aware Cruise Control to adequately slow Model 3 down for them. Always watch the road in front of you and be prepared to take corrective action at all times. Failure to do so can result in serious injury or death.
WARNING: Do not use Traffic-Aware Cruise Control on city streets or on roads where traffic conditions are constantly changing.
WARNING: Do not use Traffic-Aware Cruise Control on winding roads with sharp curves, on icy or slippery road surfaces, or when weather conditions (such as heavy rain, snow, fog, etc.) make it inappropriate to drive at a consistent speed. Traffic-Aware Cruise Control does not adapt driving speed based on road and driving conditions.
WARNING: When cruising at the speed limit, there may be situations where the cruising speed may not change when the speed limit changes.
WARNING: Do not rely on Traffic-Aware Cruise Control or Speed Assist to determine an accurate or appropriate cruising speed. It is the driver's responsibility to cruise at a safe speed based on road conditions and applicable speed limits
Can't say that shows an unambiguous endorsement even if it does work most of the time. and I did add some context regarding police and courts when things go wrong. I guess they know what they're doing. the warnings tend to cover things that if they went wrong the driver would be to blame, and they miss warning you about stuff that seems to happen, like phantom braking, but where the driver behind would likely get the blame TACC can also play up badly in heavy rain, I've had it start to close up on the car in front before now in heavy rain which wasn't confidence inspiring.