Here's the honest part: if your door was manufactured before the mid-1970s and the panels are original, we can often keep the spring and opener running, but the door itself is a different question. Steel from that era wasn't insulated, the seams don't match anything currently made, and a cracked panel on a door that old usually can't be color- or profile-matched - you're not patching it, you're replacing a section that doesn't exist anymore.
We also won't talk you into replacing a door that's structurally fine just because the opener is old. If the track is straight, the springs are balanced, and the panels aren't bowed, a new opener on existing hardware is often the right call, not a full door swap.
The climate band here is mild temperate, which is a break for hardware - less thermal expansion stress on tracks and less extreme humidity swing than a lot of the country deals with. It doesn't mean nothing rusts, but it means the climate isn't the main thing wearing your door out. Age and original hardware are.