From MARCONI through Harry at Sharkhunters:
"Washington, D.C. The U.S. Air Force is considering two new procurements to boost their close air support mission, including an off-the-shelf option for permissive environments and a cheap, clean-sheet design aircraft that would replace the Fairchild Republic A-10."
The USAF having a rapid need for a new Close-Air-Support [CAS] aircraft. Albeit one that can operate in the "permissive environment".
"To meet that rapid need, the service is examining two fully-developed aircraft, Beechcraft's AT-6 and Embraer's A-29 Super Tucano, and are planning a fly-off for this fall."
Permissive environments! American aircraft in an area of operation where there is a low to nil chance of shoot-down by enemy air defenses. Those air defenses to include surface-air-missiles [SAM] OR anti-aircraft-artillery [AAA].
THE A-10 THUNDERBOLT DESIGNED TO OPERATE IN A HIGHLY NON-PERMISSIVE ENVIRONMENT OF THE RED ARMY. SAM AND AAA IN ABUNDANCE.
A-10 very redundant, two engines, dual tail, titanium "bathtub' cockpit with windshield that can withstand a 23 mm gun round, etc.
A-10 able to take a lot of punishment all the while dishing about a lot of aggravation for the adversary.
From Tee see seen at an aviation forum this item perhaps most pertinent and important regarding a replacement for the A-10: