There are thousands of Magnum owners who believe that 3 years of the Magnum isn't enough. There is no other vehicle like it available in the American market, and if it was marketed appropriately would be selling in numbers that would justify its continued existence.
Many Magnum owners are confronted by strangers who ask them "what kind of car is that" and "who makes that" There is a market for this vehicle if you choose to seek it out. GM is planning on bringing a Holden wagon to the states that will be V8 powered and rear-drive, BMW is working on a wagon-type vehicle that would compete in this segment. Do you want to lose market share to these companies with nothing to offer but bland 'crossovers' and rebadged Durangos
Think about it, Chrysler.