Perhaps it is useful to document the different ways highway=path looks in real-life:
Residential Paths
narrower
Trails
A T6 path (SAC scale)
Also T6, UIAA 2
Pathless Terrain
Scrambling
Rock Climbing
or without ropes (free solo)
in Australia
overhanging routes
deep-water soloing
Mountain Biking
Other
Snowmobile trails over frozen lakes: