Most of the housing across this service area went up between 1962 and 2005, with the median build year sitting around 1983. That means a lot of garages still have the opener that came with the house - a chain-drive unit from the 80s or 90s, often 1/3 horsepower, wired straight to a wall switch with no battery backup and no rolling code. These units were fine for their era. They were not built for 30-plus years of damp winters cycling through a bay door twice a day.
The climate here is cold and moderate rather than extreme, but that steady damp works on gears and circuit boards slower than a dry climate would, which is part of why so many of these original openers are still technically running when they fail - the motor windings and gear sets degrade gradually, then quit all at once. Homeowners in the 34 named areas we work across, mostly 1980s and 90s construction, tend to call us with the same story: the opener has been slow and loud for a year, then one morning it just hums.
Newer builds nearer Issaquah Highlands and Snoqualmie Ridge sometimes already have belt-drive or wall-mount units, but even those are now old enough that first-generation logic boards and old-style remotes are starting to go.