Under ANGEL, we kept 1 year of courses on the "live" production system and held archive servers for the previous three years. So we always had at least four years of courses that we could pull data from. We did this for performance and house keeping as well as to meet our data retention policies. I'm curious what everyone does with their older courses under Learn? Something similar to what we did under ANGEL? Leaving them all on the production servers? Some amalgm of the two?