We come out of Frisco to reach Murphy, about 16 miles away, so we're not a same-block callout the way a depot crew might be. What we can tell you is what we find once we're on-site, and in Murphy that's fairly consistent: most of the housing here went up after 2000, and a good chunk in the mid-2000s, which means the track hardware is builder-grade steel with roll-formed brackets rather than the heavier gauge stuff you'd see on an older custom build. That hardware holds up fine for years, then one bracket screw backs out, the track flexes half an inch under load, and a roller pops loose on the next open cycle. That's most of what off-track calls look like out here.
The fault almost never starts as a dramatic hit-the-door-with-a-car event, though that happens too. More often it's slow: a bent track section from a bike or trash can clipping it, a cable that's frayed just enough to let the bottom corner drop, or a bracket that's worked itself loose after two decades of daily cycling since the house was framed. None of that shows up until the door binds or jumps the track mid-cycle.