Most of the service calls we get out this way involve the same handful of parts. Kathleen's housing stock centers on 1990, which means a lot of garage doors here are original or close to it: steel sectional doors on torsion springs rated for a 20-plus-year life that's now running out, and openers from the chain-drive era with worn gears and circuit boards that don't like power surges.
The second most common call is cable and roller wear. A torsion spring that's been cycling since the early 90s has usually seen 10,000+ open-and-close cycles, and the galvanized cable running alongside it starts to fray right around the same point the spring starts to weaken. When one goes, the other often isn't far behind, and a door that was fine Monday won't lift Thursday.
We also see a fair number of track misalignment calls, usually from a door that's been forced or hit, not from age alone. That one's less tied to the build year and more to daily use, but it still shows up often enough to mention.