Rialto's housing stock centers on 1982, which puts a lot of these garage doors and openers right at the edge of what their original hardware was built to handle. Across the wider area we cover, construction runs from 1958 to 2003 with a median around 1983 - Rialto sits almost exactly on that line, which means the doors here are neither the oldest nor the newest we see, just solidly middle-aged.
A door and opener installed in 1982 has usually been through at least one motor replacement already, sometimes two, but the original torsion spring and the original track are still common. Springs are rated for a number of open-close cycles, not years, and a household that's used the garage door as the main entrance for four decades runs through that rating faster than the spring's age would suggest. That's the failure we see most in Rialto: a spring that looks fine until the day it isn't, on a door that otherwise still works.
The climate here falls in the moderate-heat band, which is kinder to doors than the hotter inland pockets - less daily expansion and contraction on the panels and track, which means less of the warping and misalignment that heat-stressed garages further out deal with.