Bio-diversity on the Internet is a good thing, just like bio-diversity in the real world is a good thing. The Amazon S3 failure yesterday caused major disruptions in a lot of Internet services, particularly on the east coast of the U.S.
As companies like Amazon, Microsoft, and Google hold and manage every-increasing portions of Internet content and services, the potential for an service outage to cause major disruptions becomes greater as well. Technology fails, and it is dangerous for any company (or individual) to keep all data in one "basket." There is still nothing safer than a couple of external hard drives, stored in two different locations (e.g. not your business or your home) with your valuable data. Putting it all in the cloud puts it all at risk.