The A-10 works well in exactly one environment out of dozens of anticipated environments in potential future conflicts. It was built for a cold war mission: bottle up Russian armor in the Fulda Gap.
It is slow, has modest range, and doesn’t fly very high. It’s not able to protect itself, and it is a sitting duck for a true fighter aircraft.
In a high end, near peer conflict, the A-10s all die on their first mission. They’re vulnerable to an integrated air defense system, they are vulnerable to enemy fighters. They’re just plain vulnerable. I like the word sitting ducks and yes, they are sitting ducks.
They were great in Iraq, because there wasn’t a single Iraqi fighter or reasonable Iraqi air defense system left to shoot them down…. In Afghanistan, their high altitude takeoff performance was…limiting. They could take off with either fuel or bombs, but not both. With bombs, they had to be refueled at an altitude below some of the mountain peaks.
To keep an entire weapon system platform, that can only do one thing, only fly one mission, and only in a permissive environment, is a huge cost.
So, yeah, I actually believe that we are better off buying a few F 35s to replace all the A-10s. The F 35 survives, the first few days of the war, and when it turns to a ground war, and we need a man fighter capable of providing weapons on target in close proximity to Friendly’s, requiring detailed integration, we roll the F 35 into that mission.
In non-stealth mode, it carries a lot of ordnance, and still has better speed, range, precision and survivability than the A-10.
Keeping an ancient one trick pony airplane around because it has a big gun is ironic in a discussion about battleships…