If your garage door went up with the house, around 1989 for most of Old Jefferson, it's pushing 35 years on hardware that typically runs 10 to 15 before fatigue sets in. That shows up as a door that sags at the bottom corners, panels that have started to bow in the middle, or a spring that's visibly stretched past its coil spacing.
Rust at the bottom panel is common on original steel doors here - not from hard freezes, since this area's climate band stays mild with only occasional freeze, but from the ordinary cycle of humid air and rain against unpainted or chipped steel at ground level. You'll also hear it before you see it: a grinding or popping sound on the rollers usually means the track has drifted out of alignment over three decades of use, not that the opener is failing.
None of this means the door is a lost cause on its own. But once the steel is bowed or the spring's been stretched that long, patching it buys a season, not a decade - that's usually when replacement is the better number than repair.