White Center's median home was built around 1975, older than the 1983 median across the wider service area covered from Tukwila. That fifteen-plus-area stock trends 1980s and 90s construction; White Center sits ahead of that curve, meaning more of its garages still carry the hardware that came standard before torsion springs became the norm - extension springs running along the horizontal tracks, sometimes without the safety cables that later code required.
That's the failure pattern we see reversed here compared with newer pockets of the service area: not tracks bent from age so much as brackets and pulleys sized for a lighter, thinner door than what most homeowners want to hang today. Swap in a heavier insulated panel door without upgrading that hardware and the opener strains, the extension springs overstretch, and the door starts dropping unevenly within a season.
The service area sits in a cold moderate climate band, and a 1975-era steel door with minimal insulation shows that weather faster than newer stock does - cold mornings make old springs and dry rollers stiffen up and bind. None of this is dramatic, but it's the reason a straight door swap in an older White Center garage usually means new track and spring hardware too, not just a new slab bolted onto what's already there.