Electronics-first opener design
Here you're dealing with steel sectional doors on standard-width two-car openings, paired with openers that were already running circuit boards and photo-eye safety sensors from the factory. That electronics-first design means a dead opener is more often a fried board or a failed sensor pair than a stripped gear, but it also means the door won't move at all once the board quits - there's no manual workaround like you'd get with an older mechanical unit.