Again for the amnesiacs...
"The F-35 will not do close air support mission the same way the A-10 does. It will do it very differently. The A-10 was designed to be low, and slow, and close to the targets it was engaging, relatively speaking," Frank Kendall III, undersecretary of defense for acquisition, technology and logistics, told the Senate panel Tuesday. "We will not use the F-35 in the same way as the A-10.."
And I think some of you are overestimating the typical CAS loadouts of current platforms. In a full blown WWIII anti-armor role the A-10 would carry a lot of ord, but not for CAS. Typical loadout for A-10's in Afghanistan: 4xGBU-38 (500 lb bomb), Sniper XR targeting pod, 7x2.75" WP rockets, and 8xLUU-19 IR flares in an SUU-25 pod. Sometimes they add a couple of Mavericks or Hellfires. Very rarely does any conventional jet on CAS carry more than 2-4 bombs. With more ord conventional jets and the A-10 must sacrifice loiter time and maneuverability.
A-10s at Bagram AB in Afghanistan:
F-18F on CAS over Afghanistan: