Horses for courses is the thing when it comes to long distance touring.
HD may fit excellent to straight US road cruising while riding endless Dragon Tail type mountain roads and crossing central Europe needs different bikes. I enjoyed 500 mile per day mountain road trips on different Wings, working off the footpegs. Mountain passes, one after the other. Getting into the flow of driving bending roads. And always having a smile for the HD poser groups when we left them behind riding up and down the mountains. Some 3000 to 7000 miles a year for many seasons. That was fun.
When I recognized I was pushing the limits once or twice too often in my later years I gave up biking. Now I'm Mogging.


Hannes
once: Green M3W; 2013
now: Red 4/4 Sport; 2011
and some practical cars for use in real life