Hey Kai
I’ve removed it because „at home“ this tag is usually not applied to hw=unclassified.
There was not much more thinking from my side involved, I figured that surface=compacted and smoothness=bad specifies the Canyon road well enough.
I drove the road with our rental RV, and just about managed to do it.
If the removal interferes with something you expect/do, then don’t hesitate to put it back.
Happy mapping,
Greetings from Switzerland,
habi