The Track Rusts From the Floor Up, and the Rollers Say So First
Humidity gets into open roller bearings, the rollers stop turning, and the bottom foot of the track takes the damage because that is where the water sits.
A Wood Garage Door in South Florida Is a Boat With Hinges
A wood garage door here gains and loses water all year, which changes its weight and its shape. That is manageable, but only if somebody planned for it.