My wife has a janisport backpack that is 25 years old. The same cost backpack nowadays has ripped seams and broken zippers inside a year. But if you can get a timbuk2 or similar pack, it'll last a decade or more. But you have to pay now.
Though they were vastly more expensive my Arc’teryx pants are 6 years old, have seen multiple expeditions and who knows how many thousands of days of wear, and show less wear than my year old Pranas.
https://www.rei.com/product/879230/arcteryx-psiphon-sl-pants...
It has a military influence in looks, but I've never had any comments or dirty looks in any conference/board room I've had it in. It's the best laptop bag I've ever owned. Durable, comfortable and versatile enough for non tech adventures. I've lived out of it for a week at a time when traveling.
It's a little visually obvious that I've used it for ten years (worn down in predictable spots) but it's structurally indistinguishable from the day I bought it, and still quite water resistant. If anything, it fits better.
Is that accounting for inflation? $100 in 1996 is $173 in 2021.