Original unit retirement age
The median home here went up around 2003, which puts the original garage door and opener right at the twenty-year mark. That's not old by the standard of a 1960s ranch, but it's old enough that the steel has thinned, the foam-core insulation (if there was any) has started to separate from the skin, and the opener's logic board is the kind that just stops mid-cycle instead of giving warning.