Yes, load carrying is pretty easy with leaf springs. Coils offer better flexibility. Longer range of travel. Chevy made the mistake of putting coils on their 1/2 ton in the 1960s giving it the same capability as Corvair. But honestly the YJ was pretty capable with leafs that were longer and wider giving pretty good off road ability. Not a rock crawler.... but a stock TJ is hardly a rock crawler compared to one modified to specifically rock crawl. Where I live, there are no waterfalls to climb. My TJs coils offer zero capability beyond what my YJs leafs offered.That would explain why most semi's still have them as well.
I like the simplicity of leaf springs, the durability of carburetors, the bullet proof strength of cast iron, the longevity of open C shaped steel frames, the ease of trouble shooting a Jeep without any solid state circuits or computer, and the freedom of a Jeep which can sit outside topless during a hurricane.
We have forgotten what a Jeep is but this thread has the correct title...
"This Jeep has always been out in the open"
I miss that.