I doubt this is just for Tesla. My wife’s Honda works the same way, but doesn’t follow GPS. It just follows the lanes. It will drive the car, maintain distance and speed with traffic. In stop and go traffic, it will stop and go as long as you don’t touch the brake pedal. I’m sure other brands like Toyota are similar. It just requires some steering input, and a weight would provide that as good as your hand.
I would never trust it to drive for me, regardless of if it’s Tesla or another brand.
Is this the Adaptive Cruise Control with Low Speed Follow? I drive a disabled friend to appts. in his modified Honda Odyssey and I was looking that feature up. They pretty much said not to use it in high traffic and that driver should monitor at all times.