The logic with the coding is that the gas tank had to be dumbed down in operable size due to the percentage of miles vs the electric miles. To meet requirements, the gas range can't be even with the electric range nor even within close proximity. I forget the exact numbers but that's the logic. So since the newer models have significantly higher electric range, BMW doesn't have to lower the gas range to meet their requirements. The gas range is already low enough at the actual tank size. No need for them to dumb it down.
A fanatic of all things electric. Ridables like electric ice chests and stand up scooters I adore. Drones like DJI, I root for. I'm a fan of both, but nothing beats my love for my 2016 i3 Rex with Deka World. Shhh, don't tell my wife.