The root cause traces straight back to the build year. A garage framed in 1959 was built to hold a door and not much else - no opener load, no bracket reinforcement, because openers weren't standard equipment on houses of that era yet. Everything added since has been retrofit work, done to whatever standard the installer at the time was working to.
Across the wider service area we cover, there are 6,658 owner-occupied houses out of 16,654 households, mostly dating to the 1960s and '70s - a decade or two newer than Irvine's own stock. That difference means the fix that works two towns over doesn't always apply here. A header that's fine on a 1971 house can be marginal on a 1959 one.
Add the cold-climate factor and you get openers working harder against stiffer cable and tighter tolerances in winter, on hardware that was never engineered for the load in the first place. That combination - older framing, decades of retrofit, and a real winter - is the actual cause, not a bad opener brand or bad luck.