Understanding how vendors' approach the selling and implementation of e-discovery technology is a good barometer on how the market has matured and where the problems lie for the customer.
Before 2003, most e-discovery sales were service related and outsourcing was the norm. The focus was on the right side of the EDRM model (processing, review and production). How ESI was collected and preserved was not attracting a lot of attention back then. Most collections were either forensic acquisitions or manual "drag and drop" into a folder across a corporate network.