First-generation chain drives
The median home in Whitewright was built around 1976, which puts a lot of these garages on first- or second-generation chain-drive openers, not the belt-drive units you'd find in a house built in the 1990s. Those older chain drives use a steel sprocket and a logic board that wasn't built to run on a phone app, and after forty-plus years the gear that turns the sprocket is usually the part that's stripped down to nothing.