Most of the roller wear we see on Longboat Key traces back to two things: age and exposure. With median construction on the island sitting around 1979, a good number of doors are running original hardware on rollers that have done four decades of daily cycles - plastic wheels going brittle, steel wheels losing their bearing grease. The service area overall sits in a mild temperate climate band, without the freeze-thaw cycling that cracks hardware inland, so the wear here tends to be steady and gradual rather than sudden.
The other factor is simply how often the door gets used. On a smaller island community - Longboat Key counts roughly 4,172 households total - many garages see less daily traffic than a comparable house further inland, which slows wear but doesn't stop it. When a roller does finally go, it's usually the result of decades of slow fatigue rather than one bad cycle, which is why replacement, not a quick fix, is almost always the right call once one roller has failed.