Ah I see. I will check on that but you would think that as soon as you get on the highway that estimator would change. It is also the first place someone would look for range, not inside navigation so I would call that false advertising…
The golden number in a Tesla Is absolutely the navigation route estimate. While navigating you can open the Energy app as well to see more detail, how you are doing compared to the estimate, and specific factors affecting consumption.
I also just don't use navigation if I've been somewhere more than once. Just navigate with my head..
I use the navigation all the time, even when I know the way, because it knows about traffic jams and so I can get a good range estimate for longer trips. It even gives you a round-trip estimate back to your starting point.