Factory torsion and photo-eyes
Rathdrum doors are almost all factory-installed steel sectional doors on torsion springs, with photo-eye safety sensors built in from the start. The spring on a 2002 door has been doing its job for over two decades now, and torsion springs are rated in cycles, not years - most hit the end of that rating somewhere in the 15,000 to 20,000 cycle range, which lines up with a door that age.