rotordk,
I think an ADF is quite redundant in today's world, but comforting nontheless and also legally necessary.
A good GPS with its FMS functions makes even the radar only useful to clear the approach path of tall ships. As far as determining the course, even a glance at the radar blip while progressing inbound will tell the course to greater accuracy than an ADF (which engineers set to only plus or minus 5 degrees!)
In the wilds of the third world, an ADF is very useful just because.