Most houses in this pocket of the service area went up around 1974, which puts a lot of Cerritos garage doors and their original hardware at roughly fifty years old if nothing's been swapped since. That generation of door commonly used lighter-gauge torsion springs and steel rollers that were standard for the era but are undersized by today's door weight and cycle-count expectations. Add in a mild temperate climate - no hard freezes, no heavy humidity swings - and the springs and cables don't fail from weather stress the way they might elsewhere. They fail from age and cycle count instead, which shows up as slow sag, a spring that looks fine but is losing tension, or a track that's worn oval instead of round.
With household income in this area running well above the regional median, we also see more owners keeping doors longer through proactive tune-ups rather than waiting for a snap, since a maintenance visit here is a smaller decision against the household budget than it is elsewhere in the wider service area.