The A-10 is specifically designed as a tank buster from its ability to lotier on the battlefield, carry tons of monitions, ability to take a beating and of course the huge tank busting gatling gun. The F-35 falls short on all these criteria. The USAF is trying to use a high performance jet to do dirty work and that never worked. It cannot carry the same amount of arms, it cannot take the punishment and it does not have the gun. This is like Vietnam where the USAF had to bring back the prop driven A-1 skyraider because the fancy jets were not up to the job of ground support.
You mean the A-10 has the durability and versatility of a P-47 Thunderbolt and the F-35 the durability and versatility of a Bf 109?