My smaller Sportspackers needed all new male buckles a couple years ago, at 10 years old. I haven't had to replace anything else, either on these or on my newer Bikepackers. Both sets were on a three month tour, and the smaller one have been in daily use commuting and some weekend "chores" like 25 mile rides to a local apple orchard and back on nice weekend days. (You can get a peck in each Sportspacker, and a half a bushel in a Bikepacker!)
Someone suggested getting an extra set of upper hooks and splitting them between a pair of Ortliebs if you're going to take them on a lot of dirt and gravel roads. Makes sense maybe, but I haven't broken any original hooks on mine.