Applewood sits in a cold-climate zone with severe winter swings, and older hardware doesn't do well with that kind of temperature cycling. Steel contracts in a hard freeze, and a spring or cable that's already fifty years into its service life doesn't have the give left to handle it without stretching, kinking, or snapping outright.
Houses built around 1970 also predate a lot of the weatherstripping and insulation standards that came later. That's not a safety issue, but it means more of these doors let cold air straight into the garage, which speeds up corrosion on anything metal - springs, hinges, track bolts - faster than it would in a sealed, insulated bay.
With roughly 3,424 households in Applewood, most built in that same narrow window, we tend to see the same three or four failure points repeat house after house rather than a wide mix of problems.