The difference between Nokia and Samsung is that Nokia does not have supermarkets, home appliances, television channels, healthcare products, and more (although chaebol aren't supposed to have retail banking I believe still). Samsung going out of business for Korea would be like Google, Halliburton, GE, and Ford going out of business at the same time to the US economy - rather devastating I'd imagine and would take a good while to recover even though there's still a bit of competition across areas that they do business in.