Many many thanks for the simulation with different platforms.
I’ll also check this other issue: Wie kann ich eine Reise entlang der Meeresküste planen? no Autobahn / Bergstraße - #10 by BorisCH . If you look at how many way points I had to include in my planning, you realize how difficult it is with Kurviger to follow the coast without passing through the mountains or the highway. (but that’s another topic).
As for the “challenging” travel time of 1h19:
I assure you that it is impossible to maintain this time on this road.