A Disaster Recovery situation is the worst nightmare of an application manager. There are a zillion data back-up solutions available in the market, but at best they are just like insurance - you hope it would work in the event of a crisis such as cyber attack or crash, but one doesn't know for sure. The reality is that getting an application up is messy, once we add application configuration and application data to the mix.
With most applications on cloud these days, they remain exposed to the worst of internet threats. No airline can stop booking tickets just because their ticketing system went down. Neither can a retailer afford to lose billing on a Black Friday because the order capture or the inventory system is down due to an internal or external event.