I don't see how that relates to attrition one way or another. As long as the DM knows the baseline that's all that matters, targeting "fresh" PCs is the baseline. I have no idea how else you would do it.Crawford said as much here: x.com
What kind of terrain might I find in an adventure between locations? What penalties or ways to attack resources might I use beyond just spell slots, ever-climbing HP, and maybe exhaustion?I know there’s 3PP, but if the greater world of DMs isn’t terminally online talking about D&D, they may not even be aware of such a thing. Their game would be enriched by it being included in the default corebooks, and we’d all have a default resource to rely on.
How are they supposed to tell you what environments are when every campaign has unique environments? The basic penalties are exhaustion, damage, whether or not you can rest and is it a long or short rest. If you want more detailed rules there were rules for sustained injuries and other effects in the 2014 DMG.