I’ve got a backpack that’s falling apart after less than a year and was looking for a much better one that will hold up well. Specifically, the use case is dragging food home from grocery stores or dragging cards in plastic boxes/board games around at best…
In that case you might want to look into all leather backpacks or heavy canvas. Both are repairable, though leather is also waterproof. They both take patches well and maybe even pins.