Thanks. Seems like a bad design decision, knowing your expected range based on your long term driving patterns seems essential. EPA range is pointless.
Au contraire, showing expected range based on past driving habits can be misleading.
First, the number varies from car to car and person to person, not to mention season to season and day to day.
Say you've been doing a lot of city driving with heavy HVAC use (really hot or really cold, pick one). Your average efficiency would be very low. If you plan a long-distance trip based on this efficiency, it will be very much underestimating just how far you can go on a charge.
In another scenario, a shared vehicle. Both my wife and I drive the Model 3. She drives it about 15% more efficiently than I do (while driving faster, I haven't figured this out?!). Basing it on either of our usages could be wrong depending on who is driving, and the average between us isn't fair either.
Furthermore, what about used vehicles? The previous owners of my Smart fortwo said they got an average of 30mpg with it. I got closer to 70mpg. It's an extreme example, but if the Smart was constantly assuming 30mpg for the first while, it would be very wrong about how far I could drive it.
Enter EPA ratings. I know that my wife gets 20% better than EPA for highway. I get very slightly better for highway. In town, I get 30% better than EPA for round trips. With heating around 5 degrees C outside, I get nearly the exact EPA rated efficiency. If it gets much colder, I know it'll be perhaps 10-20% worse than EPA.
All that to say, EPA provides a good reference point if nothing else. That itself is quite valuable, since: every driver, every driving condition, every trip, every environment
is different every time. Most vehicles with "estimated range" are commonly known to be hilariously wrong. My Honda Crosstour often thinks a full tank can get 700km (which depends on how I've been driving within the last 20km or so), but 600km would be pushing it in reality. You can know ahead of time if your conditions will be more or less efficient (speed, temperature, etc.) and plan accordingly in relation to the rated range.
And to answer your original post (though I think it's answered sufficiently at this point):
The range displayed near your speed with the battery icon is based on rated range. The only way to display estimated range based on your driving behaviour is with the "Energy App" (the one with the graphs), which
also displays a flat line representing the rated range so you can see if you're doing better or worse than rated efficiency based on the last 10/25/50km (whatever you have selected).
