i have been through loads of interation of bags and finally found my best one yet in the form of a lowe alpine sting (or dutch army sting)
OK.
Obviously there are different qualities if we compare issued German and British equipment.
The German army 34 litres Heim Cordura Rucksack is tough like a tank and seems to last a lifetime in civil use. The first ones are approximately 35 years old and usually look as good as new. Most were used in the army of course.
The 65 litres Flecktarn version gets slowly delaminating snow collars inside, is very tough too but without real hip belt no good option for usual bushcraft use. It must be packed very light to convince.
Perhaps it's a different build quality, perhaps the Germans treat the equipment more carefully. I don't know that.
All used Cordura German army rucksacks I have seen weren't broken. Sometimes one can find a little cut of a sharp stone at the bottom of course.
I have never seen a broken buckle, never an open seam, never a missing strap.
Perhaps they repair it before they sell it. That's possible. I didn't serve in the Bundeswehr. But the German stuff we see in surplus shops is usually in very good conditions.