Interesting! There will be a continued demand for non-reluctor ring driveshafts as the intermediate models get scrapped then...
I'd still reckon the driveshaft will be fine - as long as there's whatever the magnetic sensor requires to function there. Rather than the ring being the issue, it's whatever else the later driveshafts use to trigger the sensor that's going to be important.
Does that mean that there are potentially three different Land Rover driveshafts for early non-ABS, earlier ABS and later ABS cars? Or possibly more if the automatics or Td4s are different side to side?