Only because there are numerous linux programers working on Inkscape, and none willing to work on XaraLX. That's whats really the saddest part.
I, myself have been very slowly working on learning some programing but, unfortunately I am not very handy at learning from text. But, once I do finally feel I have enough under my belt, and understand... I definitely plan on trying to work on adding this same type of functionality to XaraLX
But this is probably a long way off if depending solely on me