I taught hand quilting for the Original Sewing and Quilting Expo for 5 years. 8 events a year and two classes each event. That was 80 classes. Each class averaged 15-20 students of hand quilting. Making a total of at least 1200 students. No, I don't believe it dying out.
I have also taught locally with an average of 15-20 students. There is still great interest in hand quiting,