On a door built in 1991 the wear points aren't just old, they're often mismatched - a replacement roller from a hardware store repair ten years ago paired with original track, or a track section swapped after storm damage that's a slightly different gauge than the rest. That mismatch is why a door can look fine standing still and then jump the track the moment it's cycled. We also run into the opposite problem: owners who've had the door serviced once or twice over the decades and have a mix of parts nobody can identify by eye.
With a household income median above $250,000 in this area, a fair number of these doors are heavier insulated models added later, replacing a lighter original panel - and a heavier door on old track brackets is exactly the combination that pulls a bracket loose. We check for that mismatch before we touch anything, because fixing the track without addressing an undersized bracket just buys you another service call.