A house built in 1989 is old enough that the opener has likely been replaced once already, but the spring and drums might still be original if nobody's had a failure yet. When that's the case, we often find the cable fraying at the drum from three decades of the same groove being used, not just the spring at fault.
With 951 households in Westmoreland, this isn't a market with a dense cluster of identical production-built garages - it's a mix of standalone builds from different years, which means spring sizing isn't a guess-and-go. We measure wire diameter, coil length, and inside diameter on site rather than assuming a standard size, because assuming wrong means a spring that's either too weak to lift the door evenly or wound to a tension that burns out the opener in months.