Why bother with a rainy-day fund? If your company has a long-term viable business you can borrow money to survive a temporary crisis. If your company's business model is permanently ruined then you are better off calling it quits and shutting the company down than setting your cash reserves on fire trying to rescue a dead company.

During a credit crisis a viable business might have trouble raising money, but with the Fed indicating that they are willing to throw money out of the proverbial helicopters, maybe people don't consider that a real concern any more.