This area's housing stock runs mostly 1985 to 2015, with the bulk of it dating to the early 2000s. That puts a large share of openers somewhere between 10 and 25 years old right now - past the point where belts, gears, and capacitors are expected to hold up under daily use.
The heat band here is moderate but real, and it does specific damage to opener electronics: circuit boards mounted on garage ceilings sit in the hottest air in the house for a good chunk of the year, and that heat cycling is hard on solder joints and capacitors over a couple decades. Belt-drive units lose tension faster in that kind of heat too, which shows up as a door that starts slow or hesitates partway up.
With 77,529 households in the area and a median income of $116,974, a lot of these houses were built with mid-range openers rather than commercial-grade units, which means the parts weren't built for 20-plus years of daily cycling in Texas heat. That's not a knock on the builders - it's just what the housing stock is, and it's why opener failure here tends to cluster around the same age range instead of being random.