FP2 is the first ever modular phone, designed by a small company, so it’s to be expected that FP2’s modularity is not as good as it gets.
So the hypothetical question is: If Fairphone has the choice between upgrading the core module of a pretty modular phone or creating a new, super-modular phone which then can be upgraded indefinitely, which should they choose?
Be aware that in fact there are probably more steps (FP models) between the FP2 and a super modular phone. I’m sure it’s not an easy decision but I’m also sure that the Fairphone team has much more info to help them decide and that they will choose the best (for the environment) possible option.