^^This and actually that would explain everything about civ series development where civ4 is real exception. I mean - old civs (well, talk about 2/3) where at time when CD games ruled the world. Civ5-6+ are made on world where online gaming, Steam (Trains ) etc. direct market (just drag Demand and Supply lines and develop what market demands). So this window.. this window was just perfect place for right development team to do something for history you know..