Chandler sits in a severe heat climate band, and that matters more for garage doors than people expect. Steel torsion springs lose temper faster under repeated heat-expansion cycling than they do from age by itself - a spring in a mild climate might outlast one here by years on the same door weight.
Most of the housing stock in this area was built between 1985 and 1993, with similar stock across the four main neighborhood areas we work in, from the side near up through the pocket near out toward Sun Lakes (5 miles). That means a huge share of the doors we see are either original builder-grade springs well past their rated cycle count, or a first replacement installed 15-20 years ago that's now hitting the same wall.
Garages here also run hotter than the house itself most of the year, since they're rarely conditioned space. That pushes lubricant on rollers and hinges to break down faster too, which is why we often find a worn spring and dry rollers on the same door, same visit.