In the real cold winter time 2017/18 I was bored and thought about my current way of navigation DURING my RIDES. For about 2 years (+30000km or 18600mi) I was using a Garmin Montana 650T rugged outdoor navigation device for doing my off road adventures. It worked ok – NOT more or less. Its old hardware, THE sometimes buggy software, the bad display, processing time, etc. made the decision easy for me to get rid of it. In my opinion this device is antiquated compared to the features a smartphone offers. A look to other current / actual new motorcycle navigation systems showed the same. They are far behind in many properties a smartphone offers for off road navigation.
So the decision was made: In future I will use a Android smartphone for navigation!