The Vingroup conglomerate can go into vast amounts of debt to keep Vinfast alive. I don’t think that a superior product will win in the VN market and kill VF. It’s pretty much a pride project of the nation. Probably, the brand will still exist in 10 years and would eventually gain enough knowhow to make a compelling product. It just needs that long amount of time.
Tesla needed over a decade to make the Model 3 and the popular Model Y. Vinfast needs at least the same time or even longer.