12 minutes ago, CaptainIxidor said:41 years since it's original introduction. It's first flight was 5 years before that.
I thought it was older as well. Was there another similar craft before it?
Not really. They used modified cargo planes for the role before they added the A-10 in. She was designed as a counter to Soviet heavy tank battalions iirc, we've just discovered that she makes a very beautiful anti-anything on (or in with the introduction of more advanced delayed fuse missiles) the ground platform as time went on. They've been trying to replace her since the early 90's and nothing that has come up as an option has come close to what the A-10 can do overall.