Highland City's housing stock centers on 1999, which puts most of its roughly 4,333 households in a narrower, more recent construction window than the 1966-1999 spread (median 1986) you see across the other 24-odd named areas this company covers. Newer doors generally mean fewer of the ancient failure modes - no flaking wood panels, no decades-old extension springs rusted to the point of snapping - but they're not immune. Torsion springs on doors from this era are now 25-plus years into a cycle life most manufacturers rate around 10,000 open-close cycles, so a lot of them are due or overdue for replacement regardless of how the door looks.
The climate here doesn't help or hurt much either way - this is a mild temperate band without the freeze-thaw cycling that cracks concrete footings further north, so the failures we see are mechanical fatigue, not weather damage. Humidity does work on unlubricated steel hinges over enough summers, which is the one climate-linked issue worth a yearly look.