Skip maintenance on a Groves door and the failure mode is mechanical fatigue, not weather damage. This isn't an area where ice dams or heavy snow load stress a door - the climate here runs mild with only occasional freeze, so the risk is corrosion and wear working quietly on hardware nobody's touched since installation. A door built in 1966 has had sixty years of cycles on the same torsion spring and drum unless someone's replaced it. Add a household income and homeownership pattern typical of this area, and a lot of these doors are original because nobody's had a reason to touch them - they still open and close, right up until a cable frays through or a spring loses its last coil. By the time it's loud enough to notice, you're usually one cycle from a cable snap, not a slow decline you can put off.