> the A-10 is simply the best manned aircraft we have for CAS
You won't hear it here or on jalopnik et all, but there's substantive disagreement on this.
The A-10 no longer has a primary mission: the gun is not effective enough against modern tanks. For CAS in low intensity conflict it's both overkill and overly expensive per operating hour vs alternatives. The CEP on the big gun is >10m while the CEP on small guided munitions is now Let's compare to Beech's proposed attack variant of the T-6 Texan II. Depending whose numbers you believe, it's 1/5th to 1/10th the total operational cost per flight hour. Since it's our primary trainer essentially every pilot is already familiar with it. Likewise the ground crews can keep them running with ease. There is no parts problem, whereas with the A-10 replacements parts we don't have in the sitting in the AZ desert have to be done as small scale reverse engineering (for the cost of re-winging an A-10 we could have bought a new Texan or Tucano). It has a built in stabilized E/O ball, the advantage of which could be mitigated a bit by putting a pod on the A-10. But the T-6 is also a two seater, which allows situational awareness an A-10 pilot will never have. The back seater can focus exclusively and continuously on the situation on the ground, whereas an A-10 pilot has to re-acquire and re-orient on every pass, losing awareness of changes between passes. The two seats allows operational concepts the A-10 (and F35 for that) matter do not. For example, the back seater doesn't even need to be a pilot: they could be a controller/coordinator from a different branch, service, or even nation. The aircraft could be easily adapted to ISR roles with a back seater specialized in tending the electronics.
There's this huge internet enthusiast crowd that's infatuated with a big gun and can only see taking the A-10 out of service as some sort of conspiracy. But that's not the case, there is straightforward, solid, strategic thinking behind this.
People need to look at A-10 enthusiasm critically, and consider that maybe the planners actually know some of what they're doing, rather than being pawns in congressional conspiracies.