They still use UJ's a lot - good things, fit good ones and they last for ages, cheap and easy to replace too - also easy to blast some extra grease in from time to time. Going back when a LR called for a service every 5000/6000miles first disco's etc, on the LR job sheet everything with a grease nipple on it was meant to be greased, prop splines, UJ's steering arms - this forces out water and dirt and freshens the whole thing up, can't do that on a CV - also a UJ will work when badly worn, CV's let go sooner.
A lot of bigger American 4x4's use them at the wheel instead of a CV - makes them cheaper to repair and makes them more durable because they are quite well sealed, a CV needs a gaiter that's water tight to work and if water or other debris get in it's stuck in there, a UJ will often fling it off.
Disco's still use CV's for the props too, I will guess RR's as well.
