Analysts say Samsung's (SSNLF) move to ditch the Note 7 entirely would be costly -- it could put a $9.5 billion dent in sales and erase $5 billion in profits, according to one estimate. But the risk of prolonging the agony was worse."It's a painful move but perhaps not an entirely bad one in the grand scheme of things, as it helps isolate and contain the bad perception to that specific product rather than spreading fear that all Samsung phones might explode," said Bryan Ma, vice president of device research at IDC.