It's been 20 years and it's fine, I've spend $0 on it. Have to paint the wood ones every year or two. Ugh. The garage doors are wood and have basically rotted away. I hate exterior wood.
The worst problem with wood decks, however, turned out to be carpenter ants. They eat the wood from the inside out, so it looks fine but has the strength of a loaf of bread. I was able to push a screwdriver right through it. When I finally realized the deck had to go, when I cut through the supports it collapsed into a pile of dust. I was astonished. Instead of picking the debris up into a truck, I shoveled it.