I have an OGIO laptop backpack I got free at some tech conference once. It's probably 10 years old now and goes EVERYWHERE with me. It lives quite a bit in my hot truck, goes on all trips, gets clothes and heavy books/magazines stuff in its main pocket, and always carries a heavy laptop in it.
It still looks as good as new!
OGIO makes the BEST backpacks/bags for longevity. They really do hold up. I've seen a few my friends have, most are also MANY many years old and still holding up strong.