Irondale's housing stock centers on 1980, which puts a lot of doors here into the age range where the original torsion spring is near or past its rated cycle count. A spring rated for roughly 10,000 cycles, installed in 1980, has likely seen that many open-and-close cycles twice over by now, even on a door that gets light use.
The area also sits in a cold-moderate climate band, meaning the metal expands and contracts across the year rather than staying in one range. That cycling stresses the spring coils and the cable ends at the drum, which is exactly where we find fatigue cracks on older hardware during inspection.
Compare that to the service area as a whole - about 191,797 households and a median income of $74,943 - and Irondale's own household income, $71,240, means a lot of owners here are choosing maintenance over early replacement when they can. That's the right call on most doors, but only if the maintenance actually happens before the spring fails under load.