Sure, but the system continues to make extremely optimistic (and unrealistic) estimates about your range until you hit 50% battery, at which point it tries to b

Sure, but the system continues to make extremely optimistic (and unrealistic) estimates about your range until you hit 50% battery, at which point it tries to be more realistic so that it doesn't strand you in the middle of nowhere. It should be giving you the more realistic estimate as soon as possible, so that you can plan better, rather than misleading you for half your trip.