IC. Thanks for the clarification, now I see where you are coming from. To clarify my stance, I was completely and consciously ignoring that bit because to the best of my knowledge, Sailfish comes from the same people as Harmattan. Not the same company, but the same people.
Jolla does not have to implement all the bells and whistles anew, only remember how they were implemented the first time and do it again, in those few cases where for copyright reasons they cannot use an already existing code.