Pulleys, Gears, Rope, Elevators and Draw Bridges

So we have chains and levers already. Why not make pulleys and gears and spools to work complex builds? There are so many applications that this could be used for. Draw Bridges would be my personal favorite, but if there's a deep cave that's difficult to traverse because it's vertically steep, use it to make a platform that works like an elevator! If we have chain, why not make rope out of different plant fibers that might age in weather conditions and a certain amount of in game days? They could be used for different things, like rope bridges, a well to pull water or lava up with through a bucket hanging on the rope by a hook or something. This could also be used for elevators but if it breaks, there's fall damage :D eventually maybe you can add cable to both transfer power and use for heavier loads or more complicated elevators. There are so many possibilities! And the cable, we could use copper to build it! I don't see why we can't use copper and iron for different pulleys or gears! It would be so fun 😁