This past summer, I replaced the wooden garage side door with a steel door. After all, every warm season had brought with it the Great Door Problem: humidity made the door swell and, thus, cease to fulfill its primary door-like function, which was to open on request. As you might expect, I soon tired of hurling myself at the door like a character in a bad cop show. However, once the steel door was installed, all was well.
In the summer.
I have since discovered that the door's locks freeze in extreme cold weather, making the new door even less useful, if possible, in winter than the old door was in the summer.