Downside to Using A Cloud as Sole Means of Storage

Did you know that there is a downside to using a cloud for all your storage needs?  For example, recently, Gmail was inaccessible for half a day causing users a half a day of lost productivity.  Had these people, especially the business users had a server of their own, their data would have been readily available.  Using a cloud as a back up to your regular storage is a great idea.  Using a cloud as your only place to store your data is never a good idea.  Always keep your data stored in at least 2 places to minimize the risk of lost data and/or lost productivity should you be unable to access your data in one place.