I have not heard of this after-market GPS software. Apple Maps works great with Apple Carplay for me and a GPS app with Android Auto should work sufficient also.
For BMW, Audi and other brands that comes with HUD (Head-Up Display), right now only the proprietary nav is compatible to project detailed route info to the HUD. This case it makes sense. For VW, you can put the map on your digital dash if you got one, it can help familiarize with the road or can be handy when you are in a new place.I can't even believe anyone offers dedicated proprietary nav anymore in cars with Android Auto/Apple Car Play.