Cycles count more than years
That matters because torsion springs are rated for a number of open-close cycles, not a number of years, and a 30-year-old spring on a door used daily has almost always used up its rated life by now whether or not it's ever failed yet. Houses built in this window also tend to have steel doors rather than wood, so the fault is in the spring, track, and opener hardware, not in panel rot.
