Germantown's housing dates mostly from 1951 through 2015, with the bulk of it going up in the 1980s and 90s - that's the median build year for the area. A torsion spring on a door from that era has had decades of cycles, and steel fatigues the same way regardless of how well it was installed originally. Most springs are rated for a set number of open-close cycles, and a 30-to-40-year-old door has usually burned through that rating more than once already, whether or not anyone's replaced the spring in between.
Climate matters here too. This area sits in a severe cold band, and that's harder on spring steel than people expect. Cold makes the metal more brittle right at the moment the spring is under its highest tension - first lift of the morning on a January day. Repeated freeze-thaw swings through the fall and winter accelerate metal fatigue that a moderate climate wouldn't produce at the same rate.