A door built around 1981 typically runs on a torsion spring system with the original steel drums and a center support bracket that's held up fine for four decades but was never designed to be maintenance-free. Grease dries out, the bearing surfaces wear unevenly, and the cable drums develop grooves you can feel with a bare hand. None of that shows up as a dramatic failure - it shows up as a door that gets noticeably louder, then one day doesn't come down square.
The cold-moderate climate this area sits in adds a second layer. Freeze-thaw cycling through the winter months stiffens old lubricant and lets moisture into hardware that's been open to a garage's temperature swings for over 40 years. That's not a Fairwood-specific weather event, it's a regional pattern, but combined with 1981-era hardware it's exactly the combination that produces off-track rollers and torsion springs that finally let go.
Skipping maintenance on a door this age isn't like skipping it on a newer one. Newer doors have more forgiving tolerances. On original hardware from the early 80s, a neglected roller can chew through track lip in a way that costs a track replacement instead of a lube job.