A company that provides a needed product/service has the minimum it needs to survive. But you also need positive cash flow and you need to not have surprises an

A company that provides a needed product/service has the minimum it needs to survive. But you also need positive cash flow and you need to not have surprises and many other things. So it's easy to get caught in a bad situation and the company is forced to shut down, even though it was otherwise doing good things. Startups are particularly vulnerable, regardless of their PMF.