On a door built in this window, the failures we run into most are torsion spring fatigue - springs are rated for a cycle count, and a door that's 15 to 20 years old has usually put a few thousand open-close cycles on the original set - and roller wear on the steel track, which shows up as a door that shudders or drags partway up. Both are mechanical wear, not defects, and both are expected at this age.
What's less common here than in older housing stock is spring failure from rust or corrosion seizing the shaft, since these doors haven't sat through decades of weather on the original hardware. The mild temperate climate through this part of the service area doesn't put much stress on steel components either way - no deep freeze-thaw cycling, no salt air - so when a spring goes on a door this age, it's almost always plain fatigue, not weather damage. If the opener's photo-eye sensors are out of alignment, that's usually a bump from a car or a stored item, not age.