I would be more surprised if it has been in production for the last 6 months, for which to stop production. Any manufacturer of complex system weighs the value gained in keeping model in production vs the value generated by using that same production line instead producing new models that are selling well or to build up inventories prior to lease of a major product. Nikon, like most manufacturers are production constrained more than sales constrained. If you are a a bakery and have two ovens what are you going to use them on, next week's holiday cake or the liked but very slow selling cakes for the holiday just passed? You could do both only if you had many ovens, some sitting idle much of the time. Nikons are relatively cheap partly because managers manage their resources well.
Nikon has a number of models in their catalog which probably have not been made for a long time, but for which there are still units in the warehouse. Stan St Petersburg Russia