I don't think everybody is capable of needle turn applique. At least I am not. I tried it numerous times and was never happy with my results. So, I never did applique until I got my GO cutter and the GO embroidery designs. I love doing applique now, but I just don't have the talent to do needle turn.
I am sure it is not a dying skill. A whole lot of people do a fantastic job and it is beautiful.