The complaint we hear from this part of our coverage area is almost always the same: the door jerks on its way up, there's a grinding or popping sound near the top of the track, and sometimes the door hangs up a few inches short of full open. That's rollers wearing out, not the opener failing.
Most houses here went up around 1985, which puts the original hardware squarely in the era of steel ball-bearing rollers riding in galvanized track. Those rollers were fine hardware for their time, but thirty-plus years of Arizona heat bakes the lubricant out of the bearings faster than it would in a milder climate, and once that happens the steel starts grinding against the track instead of rolling through it. You get flat spots on the roller wheel, which is what causes that rhythmic thump every time the door moves.
The other wrinkle in Paradise Valley specifically: this is a smaller, tightly built pocket of our service area, not a sprawling subdivision with thousands of near-identical doors. Rollers here wear the way the house was built to wear, on hardware installed once in the mid-80s and mostly never touched since.