First off, I like DAB. Have a receiver I bought a few years back in the kitchen, and it's great for listening to while I'm cooking.
The only other place I listen to radio is in the car. Herein lies the problem: I don't have a DAB in the car. I am unwilling to go out and buy another radio when FM suits me fine for this. When I'm driving, I don't much care what I'm listening to (within reason). It's just background noise to stop me getting bored on the motorway.
As for AM, I haven't listened to it since I built my first crystal set as a kid. However, I would hate to see it turned off, purely because I want top be able to teach my kids to build a crystal set. It was a fantastic learning experience with an immediately useful result. You wired it up, and you could listen to the radio. Something you built yourself was picking up professionally produced content, and it inspired me to learn HOW it did so. It was probably the first moment I was truly excited to learn, and inspired a lifelong love of electronics.