Having recently replaced my rear Rubicon locker with an ARB, I can tell from experience that a LSD does provide a fair amount of traction over an open diff. To make up some numbers, let's say a Rubicon LSD provides 25% more traction than open. It's no comparison to a locker, but it isn't insignificant.Don't get me wrong, I agree wholeheartedly that no limited slip can compare to a locker when a wheel on that axle is off the ground. However, I disagree with your premise that an open diff is as effective as a limited slip in maintaining traction and forward momentum in difficult conditions when both wheels are on the ground.
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