Another GW-6900 fan here. I think you've done pretty well to only have 1 replacement band in that time. Maybe that is because you don't take it off at night!

The only other thing I have with similar levels of toughness is the rogue leather hat I wore for at least 20 years. https://rogue.co.za/collections/headgear But I eventually sweated a hole in it and had to buy another one.