Across the wider area we cover, the median home was built in 1981, but Palm Beach's own housing runs older on average, with a median build year around 1971. That decade matters for panel work specifically. Steel sectional doors from that era tend to run thinner gauge, narrower panel widths, and simpler rib patterns than anything made today, which is why a single damaged section can't always be ordered off a current parts sheet.
The climate here is mild temperate year-round, so you're not getting the freeze-thaw cracking that splits panels in northern states. What you get instead is slower, steadier wear: salt air and humidity working at the seams and the bottom panel where water sits after rain, plus the occasional dent from a trailer hitch or a bike pedal that never gets fixed until the whole section is bowed. On an older door, that bottom panel is usually the first one to need replacing, and it's also the hardest to match.