I beg to differ...... I threw a spacer lift, tube flares and 37s on my wifes JKUR when we first bought it and then proceeded to beat the piss out of it at several offroad parks in Texas and Arkansas. Zero axle problems. I'm not talking about trail riding either. Thing was bashed from front to rear underneath, stock skids pushed up several inches, frame gouged up and several lugs torn off the tires from my heavy right foot, and those axles were fine.
They now have aftermarket ball joints, cromo shafts and trusses F&R, but only because I switched to 40s. Still zero axle problems and the 40s are almost 2yrs old.
These new Rubi axles are nothing like the 44s that came in TJs, they are superior in every way.