Sure they do, but someone who bought a Roaster in 2008 surely has it paid off by now. However unlike every other manufacturer that forgets about the vehicles it used to make (unless there's a recall), Tesla is improving existing products.

I have a 2004 SUV with a 7" satnav in it and some god-awful software package. Does Acura offer an upgrade path for this? Other than a way to update the roads database, no. Buy a new SUV.