A technician pulling up to a house with a garage door from the 1990s or earlier usually sees the same thing: a heavy steel or wood door that still opens and closes fine, an opener with a big antenna and no keypad, and a homeowner standing in the driveway saying some version of "it's always worked, why mess with it?" Then the tech points out there's no photo-eye sensor near the floor, the cables are fraying where they wrap the drum, and the spring has surface rust creeping into the coils. That's the gap between "it still works" and "it's actually safe," and it's worth settling before someone gets hurt or spends money on something that didn't need it.