I bought a Thule Crossover eight years ago and the zip on it has finally gone. Short of getting a local seamstress to fit a new zip, I think it's time for a new one, and am a bit tempted by the Thule Crossover 2 30l. Are Thule still good? Is there anything else of the same sort of size that I should be considering?
Have you contacted Thule? M not even joking. I have an 11 year old Thule laptop backpack, the little rubber covers on the zipper handles perished. I called them to ask if there were replacements available and they said to bring it in and then replaced them for free.
I went with Trash Bags when picking a new bag about 6 years ago. No complaints. It's one of the best things I own. I've ordered other small stuff from them and it's always been superb quality.
I wouldn't call 8 years a great backpack. I have a North Face backpack that has seen heavy abuse and is still good to go after 19 years. So maybe check out North Face, assuming they're still making them like they used to.
Do you hate money but love backpacks? Then check out Hillpeople Gear. I have a Connor, but Umlindi might be up your alley. They're not light backpacks, but they're sturdy and the load bearing system is second to none. Super comfortable even without a hip belt.
Also check out Mystery Ranch. If you can find a used one that's be best, but even after getting bought by Yeti they still make really good shit.
I had a Thule 32L before, it was pretty good! Now I have an Osprey 26/32L, and it's really fantastic. I used Osprey in the Alps (a big hiking bag) and was really impressed so I switched when the Thule finally died.
As other people mentioned, an Osprey. I recently gave away an old shoulder bag by them that I got back in the early 2000s. That's 20 years ago! Still works, just didn't need that kind of bag any more. Currently have one of their newer Arcane bags, and so far, it's been promising after a year.
I've got a victorinox that I've had for almost 20 years. I got it in school, and it lasted several years with almost 50lbs of books in it (yes, really. It was a private school).
One strap gave way in the first year, but my mom restitched it and everything else has held since. Only other people I have is that it smells kinda funky because I can't figure out how to wash it.