Houses in this area were mostly built between 1964 and 2006, with the heaviest concentration going up in the 1980s and 90s - tract construction years where builders installed whatever opener was standard at the time, usually a 1/3 horsepower chain-drive unit. Those motors are now 25 to 40 years old, well past where the gear, capacitor, and logic board hold up.
Tualatin sits in a cold-moderate climate band, and the yearly swing between summer heat and winter cold is hard on the plastic and rubber components inside an aging opener housing - the drive gear cracks, the belt or chain stretches, and the capacitor that gives the motor its starting torque weakens. In a service area with 130,959 households and 66,619 owner-occupied houses, most running openers installed when the house was framed, we see this failure pattern constantly. With a median household income of $101,953 here, most owners choose to replace with a modern belt-drive and battery backup rather than patch a motor that's already outlived its parts.