On hardware from this era, the failure points are predictable. Torsion springs rated for late-80s door weights wear out around the same age regardless of how well the door's been treated, so a spring that's original to a 1988 build is past due even if it hasn't snapped yet. Rollers on tracks this old tend to be steel rather than nylon, which means more noise and more wear on the track itself over time.
Bokeelia's mild temperate conditions mean we're not fighting the kind of extreme freeze-thaw cycling that cracks hardware up north, so most of what fails here fails from age and cycle count, not weather damage. That's a small mercy - it means maintenance can catch problems before they become an emergency call, rather than a storm forcing the issue overnight.