I'm sure your driving style has A LOT to do with your lack of carnage.
If someone puts their foot through the floor every chance they get offroad, they are bound to pop a CV sooner or later with or without the diff drop.
If you drive it with as much skinny pedal as needed and know when to let off, I'm sure a lot of other parts will last long as well.
Hell, you even have an ARB locker up front.
I'm looking for a little extra insurance, since I have to drop the diff to do a locker or LSD up front anyway and will be playing with the front wheel travel a bit.
For mildy modified trucks it's probably not worth your time.
But, you never know..