I dare say they have a bunch of licensed code in there that they'd have to find and remove; why would they invest the resources? By keeping it closed they also

I dare say they have a bunch of licensed code in there that they'd have to find and remove; why would they invest the resources? By keeping it closed they also leave open the possibility of them bringing it back at some point in the future without creating a competitor to their own product. I note X-Plane is going cheap in response to this: http://www.x-plane.com/order.html http://www.x-plane.com/order.html