Stuart sits in a mild temperate band - no hard freezes, but constant humidity swings through the year. That doesn't crack plastic gears the way a true cold climate would. What it does is swell wood jambs and header framing a few millimeters at a time, season after season, on houses built in the 1970s and 80s that weren't framed with today's moisture-resistant lumber.
That slow swelling throws the door frame slightly out of square. An opener mounted plumb and square on install day can end up pulling the door at a faint angle a year or two later, which reads as the opener struggling when the real cause is the frame around it. With 19,430 owner-occupied houses among roughly 33,518 households in this area, that's a lot of garages built in the same window, aging the same way.
This is why we check header squareness and bracket alignment as part of every install here, not as an upsell - it's the actual cause of half the "opener failed" calls we get on houses from this era.