Another alternative is to buy quality in the first place. I spent around $100 on a Patagonia backpack, and it’s been in everyday use for over 6 years and is still fine. If it does fail, Patagonia has an excellent repair program.
I have noticed that many "quality" brands tend to introduce lower quality lines as they grow in size. Perhaps as they hire more business folks and the founders becomes further and further removed from the operation of the company. At first glance the lower quality line can be hard to tell apart from the higher quality products.
Also, price does not necessarily determine quality so it pays to be learn some of the telltale signs of higher quality products such as the stitching and materials used.
That was four (five?) years ago and that bag has been on multiple vacations and work trips and carried every day by bus and train and walking, in the rain and snow and dry, with nothing but a little dirt.
0 - This is the one I got: https://www.tombihn.com/products/synapse-25
The shoulder pad on the little messenger bag is going, but that's a wear item, and the rest of the bag is totally solid. The backpack is still as good as when I got it.
It's still in fantastic condition. Never had to repair it, except for one time when one of the strap clips got crushed by my car's door.
Imagine that: a backpack, almost daily heavy use, carrying all kinds of stuff in it, and it almost never required repair.
I'm 100% sure they don't make them like that anymore.
I use a Peak Design Messenger bag daily and it's in absolutely perfect condition after years of commuting, international travel, holidays etc. Their backpacks are built to the same standard.