Velociraptor, you are worrying about something that just doesn't really happen. A well made bow of ANY wood (except a handful of tree species that are just not suitable in the first place) will shoot basically until you are an old man. Years and years, at least. Even wooden bows don't just wear out from shooting. And, any bow's longevity has more to do with craftsmanship, design, and how YOU treat it, than wood species.n
An overstrained bow will eventually take a lot of set and shoot poorly. A badly tillered bow with one spot taking way too much of the load will evenbtually hinge there. Limbs can go out of tiller if they aren't strained correctly. If you leave a bow outside over the winter, fungus, bugs, and weather will get under the finish and cause the wood to degrade. If you over dry the limbs down to 5% moisture content, they can become brittle. If you ding it all over on the rocks and fail to touch up the finish, it can fail. If you leave it strung constantly, it will eventually take a lot of set and lose limb snap. If you use it as a wading staff to cross rivers, the finish will wear off the tips and water will get in there, etc....
There is NOTHING about wood that makes it so maple will only shoot 20,000 arrows, but plum will shoot 50, 000 before it breaks, or vise versa. Buy the bow that bends well, suits you, and that you like best, and then take care of it. Enjoy it!