I've been using the same Patagonia Black Hole backpack for nearly a decade, every day include bike commutes (and crashes). The longevity is frustrating at this point because I'd really like a larger one but can't bring myself to switch until this one fails (which may be never).

I don't see how it could be a surprise to anyone paying attention that a JanSport backpack doesn't deliver on quality. Perhaps there's more to the story but I got to the second AI slop one-liner and gave up.