The service area sits in a cold-moderate climate band, and that band is hardest on torsion springs that are already near the end of their cycle life. A spring installed when a Thompson's Station house was built around 2013 has now seen roughly a decade of temperature swings, and steel fatigues faster through repeated cold-to-warm transitions than it does in a flat climate.
With 2,699 households in Thompson's Station, a meaningful share of them built in the same narrow window, we tend to see the same failure pattern show up around the same age - which is different from older, mixed-vintage neighborhoods where failures are scattered across decades of different hardware.
The other local factor is simpler: newer doors here are heavier, insulated steel rather than older single-layer panels, which puts more static load on the spring from day one. A spring sized for a lighter door will wear out faster than the same spring on a heavier one, and we see a fair number of replacements here where the original spring was undersized for the door it was holding.