You could say that for almost any manufacturer. If Chrysler didn't have jeep or ram they would have been killed entirely, hell they tried like hell to split them all up anyway. If ford didn't have the f150 they'd be just as bad as dodge.GM doesn't need Buick in the states. I would imagine that this is their last hoorah here. Their buyers are older and as they move away from them, their sales will continue downward. But you can't cater solely to older people either. I always felt after 2009 they only need Chevy and I guess Cadillac. But if Cadillac didn't have the Escalade they'd be toast too.