The call we get most from Murphy isn't a snapped spring - it's a door that won't respond to the remote or reverses off the floor for no reason anyone can see. That tracks with the housing stock here. Most of Murphy went up around 2005, which puts the original opener units at close to twenty years old. Logic boards drift, safety sensor eyes get knocked out of alignment by a bike or a trash can, and the receiver inside the opener starts missing signals from the wall button before it misses them from the remote. Homeowners assume the door itself is broken. Usually it's the box on the ceiling.
That's a different failure pattern than you'd see in an area built in the 1970s or 80s, where the springs themselves are the first thing to go because the door has been cycling on original torsion hardware for decades. Murphy's stock is younger across the board, so the springs are less often the emergency - it's the electronics and the sensor alignment that give out first, especially after a summer of heat cycling in and out of the garage.