Gibsonville sits about 16 miles out from Greensboro, and the housing age out this way clusters later than a lot of the inner suburbs - plenty of it from the late 1990s through the early 2000s. That's a mixed blessing for off-track problems. The hardware is more standardized and parts are easier to source, but builders in that era also leaned on lighter-duty rollers and tracks to keep costs down, since code didn't demand anything heavier.
Winters here fall into a cold-moderate band, which means freeze-thaw cycles on the track mounting bolts and brackets, not the deep-freeze cracking you'd worry about further north. Over 15-20 years that cycling loosens bracket screws into the jamb, and a loose bracket lets the track flex sideways under load until a roller finally pops free. It's a slow failure, not a sudden one, which is why most owners don't catch it until the door is already hanging crooked.
We also see off-track calls after a storm shifts wind pressure on a closed door hard enough to rack the frame slightly. The door still closes, but the track no longer lines up square with the rollers, and it comes off within a few more cycles.