Most of the garage doors we look at in the Vancouver area sit on houses built between 1977 and 2011, with the bulk of that stock going up in the 1980s and 90s across the 22 named communities we cover. That means a lot of torsion springs, nylon rollers, and opener logic boards are hitting the 15-to-40-year mark at roughly the same time, because they went in at the same time.
The climate here is mild but not freeze-free. You get stretches of damp cold that still dip below freezing often enough to matter. That freeze-thaw cycle is hard on steel: it stiffens spring coils overnight, it shrinks and swells wood jambs enough to throw tracks out of plumb, and it lets moisture sit in roller bearings until they seize or crack. A door that would coast along fine in a drier or more consistently cold climate wears faster here because it's always cycling between wet-and-loose and cold-and-tight.
On the older end of that 1977-2011 range, you'll also find original openers with chain drives and worn-out trolley carriages, plus galvanized springs that were never rated for the cycle count a daily-use door racks up over three or four decades. None of that is a defect. It's just what happens to hardware that age, in this weather, on this kind of housing stock.