I've been fixing/updating things here and there in OSM (though I'm more the occasional newbie) and have come across things I found confusing or non-ideal. Similarly (but different!) to my pondering on how to get YDS more useful, I've floated some ideas for input based on breaking describing trails into three axis - hiking technique, path exposure, and path visibility.
Technique (this was pretty solid from the get go but got some great feedback)
https://community.openstreetmap.org/t/r ... ers/99869/
Exposure (this evolved quite a lot)
https://community.openstreetmap.org/t/r ... ale/99885/
Visibility (the least thought out)
https://community.openstreetmap.org/t/r ... ity/99971/
Similar to the thread here a while back discussing social trails with little to no visibility (which ended in repeated demands to source / prove information I shared from a discussion with the former SEKI trails manager, which I did), this is looking at having a few labeled waypoints for XC routes as is the current best practice in the US alpine community when sharing routes. I've deleted a few "trails" that had no ground truth to them and sliced up others where appropriate.

https://community.openstreetmap.org/t/r ... hs/98815/2
A more meta take on smoothness and surface tagging on for trails/paths
https://community.openstreetmap.org/t/r ... ity/99971/
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This involved learning more about international systems which was fun. There's a lot of overlap, but also deviation which is often inspired by very different terrain, but not always.
There's been a lot of good points made in the above threads (which really go on, so they're more for geeking out), which I think really clarifies on how to express exposure in an easily understable but useful way as well as delving more into the distinction between YDS Class 1 & 2. For trails I've come to think it's actually useful having two grades of Class 1, possibly even three (SAC has two). I'm not sure I'd bother with my little YDS side project as it focuses on XC, but I having a 1.0 be "casual walking" and a 1.5 be "surefooted walking" makes a lot of sense with how most people view trails. Reading AllTrails comments for some very simple (to me) dayhikes near the Olympic Peninsula was illuminating.
There's a good mix of constructive criticism, pushback, and some trolling heh. Overall it's a pretty thoughtful and systematic thinking community.