I whole heartedly disagree! While I will agree that the newer ones, especially the coil sprung ones, work awesome off road, I put that 70 CJ5 a lot of places. I did have, stock 4:88 and Powerlok, with a 2" lift. My Dad put it a lot of places stock, including early 70's Rubicon before lift kits and big tires. Mostly I had the 2" lift because the stock springs were worn out.
My buddies Rubicon('04 I think) works awesome, but he has put in a Rubicon Express long arm lift, gears, 35's, and other stuff. It is a lot cushier, and roomier. Real plasticy though.
And, I see the new Jeeps using the bypasses; they don't want to scratch up their $30,000+ rigs!
FWIW, I do not know of anyone with a new or old Jeep, that runs trails, that leaves them stock anyways. With simple mods, those old ones will go a lot of places.