Thank you for the great post Jerry!
Say, in regards to many of the newer JK owners, the most modern JK has an outstanding BLD, ESP, Dana 44 rear and some (most Saharas) come with TracLok. Your OP was written before the new JK came out. If I could just add a few things so newer jeepers just don't run out & buy a new locker which may be unneeded.
After just completing the Naches Trail run, you'd be surprised at how capable, flexy, and downright awesome the most modern JK is. Granted, I'm old enough to remember having to go outside and "flip" the hubs to get them locked, i wholeheartedly appreciate fully locked rigs but...
Before this last 5 day adventure tour, I was certain I was going to add ARB air lockers to the Four door JK Jeep. Nope, again I was thoroughly impressed at how well these three components work together (all JKs have a D44 rear):
Plus, adding front sway bar disconnects will keep the front two tires on the ground, where they belong even in the most funky off-camber pucker inducing event.
I will not be adding air lockers to the JK after all.
At the end of every day, all the old-timers in their flat fenders and even many of the youngster in their TJs would come over and look at the JKs and say how impressed they were & how they were certain the new JK could never keep up etc... Once they get towed out by a "mini-van" their tune changes a bit!