Aging yes. But the A-10 is timeless.
I doubt that will EVER be able to replace the A-10’s ability.
I lived in Tucson for many a year, and I had the pleasure of watching the A-10s come and go almost every day.
From what I’ve read about the first gulf war, Iraqi tank crews just wanted to “get right” with their allah when A-10s showed up overhead. They just came down and killed ya, and came back down and kept killing you some more.
If our A-10s are tired and need to be replaced, we need to replace them with another batch of A-10s.