During Desert Storm F-16s and other strike fighter aircraft flew a lot more missions deep into an Iraq air defence network which had been degraded by sanctions and pinpoint strikes, and they only lost 6 aircraft too facing greater threats.
Putting a plane within range of the other guy's heavy machine guns and light cannon in today's wars is stupid, basically. The Warthog may be "badass" but it's slow (all-out max about 700km/hr, a Boeing 737's cruise speed is about 900km/hr), it's difficult to fly low and shoot straight at the same time, the fleet is ageing out rapidly -- the last new A-10 airframe came off the production line in 1984 -- and generally it's only suitable for attacking forces that can't shoot back. Even then it's a logistical nightmare, having to be based well forward close to enemy forces to make it available quickly if needed for CAS and it requires a lot of custom kit like the ammo loader system for the GAU/8 gun to keep it operational.
As for "surviving multiple hits", any significant damage to an aircraft is a mission kill, it has to break off and attempt to return to base before bad shit happens. Yes I know, "titanium bathtub" and all that but it should never get hit by light cannon fire at all. The day of the bayonet charge, the horse cavalry and the battleship is over and it's time for the Warthog to go too.