Most of the housing stock in this service area went up between 1938 and 2007, with the heaviest concentration in the 1960s and 70s across the 17 named communities we cover. That means a huge share of openers out here aren't the original unit - they're the second or third one bolted to hardware that's decades older than the motor driving it. A chain-drive opener from the 80s or 90s paired with a rail and bracket from the original build is a common setup, and it's one where the opener takes the blame for problems that actually start in the track or the spring.
Cold winters in this part of Georgia aren't brutal, but they're enough to stiffen grease in an opener gearbox that hasn't been serviced in a decade, and enough to dry out the nylon drive gear inside a chain unit until it strips. That failure shows up every year once temperatures drop and stays slow to show up again until next winter, which is why a lot of homeowners think the problem "fixed itself" - it didn't, the gear just wore a little further and the door is heavier for it. We see the same pattern on 1970s builds and on houses finished in the 2000s; the opener doesn't care how old the house is, it cares how old the opener is and what it's lifting.