The fault we see most in Ovilla isn't a mystery once you look at when the houses went up. The median home here was built around 1997, and that means a lot of original torsion springs are closing in on thirty years of cycles. A torsion spring is rated for a set number of open-close cycles, not a set number of years, but age and cycles usually track together in a neighborhood built in the same short stretch of time. If your house went up in the mid-to-late 90s, the spring on it right now is likely the same one the builder hung.
That matches the wider pattern across this side of the county, where most housing stock dates from the 1980s and 90s, sitting inside a longer build window running from 1976 to 2014 with a median around 1996. Ovilla's own number lands almost on top of that median, which tells us the springs failing this year in Ovilla are failing for the same reason springs are failing across the rest of that stock: they've simply run out of cycles. A moderate heat climate doesn't add the freeze-thaw stress some regions deal with, so when a spring here breaks, it's wear, not weather.