Breakaway collars are an option for scenarios such as this.
I think the likelihood of a dog getting out is much greater than a dog hanging itself on a collar.
Although my dog is chipped, I want him to have a visible form of ID on him at all times. That would be the fastest way to get him home to me.
What if I was driving with him in the car and got in an accident and he bolted? Happens to a lot of dogs in that situation - it's terrifying and they have no idea what's going on.
I let Ozzy out to potty once when I was at my bf's house. After about 5-10 minutes, I went to let him back in.
I called him.
I ran to the side of the house and the RV gate was wide open. I ran out front and saw a horrifying sight. Kids everywhere, headed to school. Cars going by. People walking their dogs.
I yelled his name at the top of my lungs, almost in tears, and he sprinted from the front entryway of the house.
He'd been sitting by the front door, waiting to be let in that way.
One time while my mom and I were at flyball practice with Ozzy and her pit bull, my mom had a missed call and a message on her phone.
She checked it on the way home. It was a neighbor calling because our lab and Frenchie were running around the neighborhood.
Came home to find out our next door neighbor's little spawn opened our gate and let them out.
I would rather have a collar with ID on my dog(s) and not worry about the more common scenario of them getting lost than the rarer scenario of them choking or hanging themselves on the collar.