I'd also argue that you don't always need gold-plated storage. Think about user docs that are infrequently accessed , numerous, and must be retained for long periods. Deploying NetApp or EMC for that use case doesn't seem to make sense with options like this or OpenStack object storage.
If you mess up your data retention, though, you can get in big legal trouble. Sometimes you have to ask yourself whether you want to be the one who's liable for that.
