Nope. Samsung would not have survived. First their stock price will drop as soon as they announced the departure from Android. The market would not have any confidence in any alternative, because history has taught us well. Second, as others have already pointed out, it is either Android or iOS. Try spin up a new mobile OS today and I guarantee you it would be hard to recreate the existing ecosystem. Samsung has the money, but good luck getting enough apps. You'd have to build a whole new interpolation layer so no one has to rewrite, ot rewrite as little as possible. That will take at least a year. Testing stability, reimplement every feature in modern mobile is going to be a multi-year project. By then, someone else would have taken Samsung's place. XiaoMi would is Samsung's contenter right now.