Documenting solution proposals for `highway=path`

[osmuser63783]

Since you’re trying to document solution proposals, here is a selection (!) of threads from 2022-early 2024 that are still missing from your post.

What about routes in pathless terrain?

• Have a tag to denote fictional "pathless paths" that exist only for routing purposes?
• RfC: Have pathless hiking routes (no trail_visibility) be some manner of related nodes instead of paths

Do we need more difficulty keys?

• Should we just use `smoothness` and `surface` along with `sac_scale` on multi-use paths and trails instead of making new keys?

Ideas for more difficulty keys

• hiking_exposure RFC: hiking_exposure key (along with hiking_technique this disambiguates sac_scale)
• hiking_technique (became foot_scale) RFC: hiking_technique key (or a better name!) to describe movement on paths by hikers