That’s fair, although I think that depends a lot on the type of car you drive. There’s an option to tell Maps what type of car you drive (electric, hybrid, or gas), which will change the results, because cars with regenerative breaking often get better “city” milage than “highway” milage.
It also probably depends on factors like how aerodynamic your vehicle is, because it makes a huge difference above ~50mph (air resistance/drag increases exponentially with speed)
You could always put it into service as a network wide ad blocker with PiHole. Might also speed up web browsing a bit too, since PiHole also works as a DNS cache.