The cold-moderate winters that hit this part of the service area are hard on an opener that's been running the same grease and gear lubricant since 1997. Cold stiffens old lubricant, which makes the motor work harder on winter mornings and accelerates wear on a gear that was already thirty years into its service life. That's a big part of why we see more gear-strip calls in the colder months than in summer. The other factor is simply the age curve of the housing stock: with most of South Hill built close to 1997, a large share of these openers are hitting failure at roughly the same time, which is why the calls tend to cluster rather than trickle in evenly. It isn't a defect specific to any one builder - it's the ordinary end-of-life pattern for hardware installed in the same few years across a whole neighborhood.