Vancouver sits in a mild climate band with occasional freeze, not the deep-freeze swings that crack hardware outright. That's the good news. The bad news is what mild-with-freeze does over a long stretch: it's wet more than it's cold, and the freeze that does show up tends to arrive with wind and a power cut attached. An opener doesn't care about temperature nearly as much as it cares about whether it has power. When the grid drops during one of these fronts, a chain-drive opener from the 1980s or 90s - which is what a lot of houses around here still have, going by when this housing stock went up - has no battery backup built in. The door sits wherever it stopped. If that's halfway up, you've got a gap into the garage until the power's back or someone pulls the manual release.
The freeze itself isn't severe enough to split a track or seize a spring outright, but it does stiffen the lubricant in an older gearbox just enough that the opener strains on the first few cycles of a cold morning. That strain adds up over years, especially on units that have already been running since the house was built.