But the eDiscovery Costs!

As a records manager, I have no problem with keeping email with valuable content as long as it is useful, but way keep a decade plus of all that other "stuff" that has no value? When litigation comes (and it will come) someone will have to sort through all of it when and search tools are only of limited use. Besides, while storage itself may be "cheap" (debatable), the cost of supporting that storage is not. At 25+ terabytes and counting, I know that many of my legal department colleagues and I are looking forward to some serious deletion.