I think the A-10 will be fine as long as it doesn't have enemy fighters chasing it down and in a situation where the skies are not clear for either side, enemy fighters may not be able to get close to the A-10s operating within the range of friendly SAM coverage. It flies low enough for it to avoid a lock from SAM targeting systems and low enough to confuse radar. In places where the land is not as even as Europe, it will hide in the "shadows" of hills and mountains making it even harder to track.
Also the A-10 can actually take the damage that is claimed while the AH-64 can't.
It's one of those things that the Air Force desperately wants to replace but can't.