Two items today:
One, I leaned over the railing at my local pier today and watched one of my GW100 earpads tumble into the ocean. I've temporarily lost a GW100 earpad a few times already, but this time it was permanent. Fortunately I had a backup set on hand. They do fall off very easily.
The other item concerns my quandary regarding the benefits of a closed back design for portable and outdoor use, versus the sonic advantages of an open back design, albeit I have to find a low-noise place to enjoy those sonic advantages. I took one day away from the GW100 to use a good closed-back headphone for walkabouts, and went right back to the GW100. It seems to me that I never would have gotten to this point of preferring an open-back portable headphone, if I hadn't talked myself into going against instinct and giving it a 6-week tryout first. The trick is finding those low--noise listening places, if it's even possible for a lot of people.