Start with the number that actually decides what happens next: median household income in Silver Lake runs about $73,277. That's close to the service area's $73,072 overall, and it puts most owners here in a spot where a $150-$300 track repair makes sense, but a door that's already bent its frame or cracked a stile is better off replaced outright than nursed along.
The reason tracks go off here specifically comes down to when the houses went up. Silver Lake's median build year sits around 1995, inside the broader 1956-2008 range for the wider service area (median 1994). Builders in that era mostly hung lighter steel doors on narrower track and smaller rollers than the heavier wood or early-steel doors you'll find on pre-1970s stock closer to downtown Wilmington. Lighter track flexes more. A bracket that's loose by a quarter inch, a roller that's worn oval instead of round, a door that got bumped backing out of a tight driveway - any of those will walk a panel off narrow track faster than it would off the heavier commercial-grade rail older doors used.
The climate here is mild with only occasional freezes, so we're rarely dealing with ice-jammed track. Around Silver Lake, off-track is almost always mechanical, not weather.