I think all of us have problems getting rid of data over time. We accumulate the data over years in Datamarts but it's more difficult to get rid of it. Ok - we can delete the data. It's gone. But it's not that easy. Maybe there will be the need for the data in the future. The business has sometimes great ideas and when they plan to implement it, they want to know some statistcs about how the data looked like in the past, to determine if it's worth the effort.