Of course they do! They all do it, plus it's a good way to update "little bits" of technology without a complete overhaul of the model. (like a 4960 or 9610 or on the red side with all the different lines of Magnums and the different series of combines - they haven't changed the style since it was introduced in the 70s). The companies want the sales, but also the farmers (in our area at least) still like to have the newest_greatest_latest, and they want new equipment models too.