I echo what everyone else has already said. The availabilty/room to access stuff to work on them is much better. As with any old vehicle rust, bad wiring and the occasional broken part happen but that comes with the territory.
I actually got my CJ when I was around 17 and worked on it through about my sophmore year of school. It was always a big hit with my friends and many times girls wanted to go from a ride......if you are into that kinda thing!
I have changed my starter in the parking lot of Autozone before with little effort.
I enjoy working on mine because unless I am under the dash I am usually in a semi comfortable position...my mustang is not the same case.
In my experience, CJ's were typically mistreated and always have things that have to be redone when buying.
Oh I like my narrow track axles as well. My friends in high school all had big trucks with much larger tires...I just rode in between to avoid falling in.