I'm gonna take this in a whole other direction, I've spent much time in the woods, i live in the country on 7 1/2 acres in the hills of NEPA with a stream in my back yard zed the Delaware river at the end of my street so I have all I need to practice/home my bushcraft skills but I'm not here for that. If you want to see some ingenious bushcraft go hang with the homeless down the tracks under the bridges or in the weeds at the edge of town.
These guys/folks learn how to reuse and repurpose everything, they use old lawnmower blades garbage picked from the street to split firewood, I've seen them boiling water with rocks/stones in wooden pots they hollowed out by burning the center out with a red hot piece of steel 1" pipe that they kept in the fire just for that reason and also for defense, you wouldn't believe how they are picked on and despised by most people with homes.
There's a guy I met who lives in the woods just a few hundred feet from the track of a man commuter train line going from Jersey to NYC. He has a camouflaged hut/shack/tent depending on the time of yea, (of course his living quarter's are less substantial in the summer power the winter. I'm trying to get my daughter to use her degree in media communications to shoot a video of these people, it's a whole different world where they live forcing them to improvise every day just to survive and for them they're is no going home when they're done , they live the Bushcrafter's life. Next time you see one strike up a conversation with them, buy them a hamburger they might surprise you and teach you a thing or too.