Hinckley's housing stock centers on 1972, which puts a lot of garage doors here on torsion springs installed before today's cycle ratings and coating standards existed. A spring that's been opening and closing a door for fifty winters has absorbed a lot more than fifty years of use - it's absorbed fifty Illinois winters, and that's the part that actually breaks it.
This region sits in a cold climate band with severe winter conditions, and steel behaves differently at 10 degrees than it does at 70. Cold makes spring steel more brittle and less forgiving of the daily flex it's built for. A spring that might have held on another season somewhere milder lets go here instead, often on the coldest morning of the stretch, because that's when the metal has the least give left in it.
The combination is what makes this a local problem and not a generic one: older original hardware, installed before modern coil coatings were standard, sitting through decades of hard winters. Houses built in the same era closer to DeKalb see the same pattern, but a 1972-built house in Hinckley has had every one of those fifty-odd winters to wear the spring down, and most haven't had the spring replaced even once.