Tracyton's housing stock centers on 1982, which lines up closely with the broader service area's median build year of 1984. Doors from that era were built with steel rollers as standard, and steel rollers wear at the stem long before the wheel itself looks bad - you'll hear it as a rhythmic thump or grind that gets worse over a few weeks, not months.
The climate here is mild with occasional freeze, not the deep-freeze cycling that cracks nylon outright. What it does instead is let moisture sit on steel stems through damp stretches, so they corrode slowly at the point where the roller meets the bracket. That corrosion, not cold, is what finally seizes the roller and starts chewing up the track edge. It's a slow failure, which is why most calls come in after the noise has been there a while, not right after it starts.