Saw a guy's backpack strap snap clean off on a trail last year, just popped like cheap thread. Was one of those fancy outdoor brands too, but the plastic buckle had gotten brittle sitting in his garage. He had to MacGyver it with a carabiner and some paracord for the whole hike back.
That's crazy because you expect cheap stuff to fail, not the fancy brands. The plastic just goes brittle sitting around? So a perfectly good pack becomes totally useless from just being stored wrong. Makes you wonder about all that gear sitting in closets right now.