I had to carry out NDB tracking and an ADF approach on my recent Instructor renewal. The last time I did that was on the previous renewal six years ago. It worked both times, which perhaps says something for the level of awareness that this spatially tricky exercise hammered into those of us old enough to have used it as a routine letdown. It's sadly true that there isn't sufficient time in the IMC syllabus to teach it to a satisfactory level, especially as the NDBs are being turned off in a lot of places. Heigh Ho, switch on the GPS.