The AV-8B Harrier II is a different beast, with many automated tasks. Some of the technologies in the AV-8B are in the new "Joint Strike Fighter", - hover mode is "hands-off". Try that in an AV-8A and your widow will thank you for the VA home loan at your grave.
As for combat, During the Desert Storm ground war, AV-8Bs were based as close as 35 nautical miles (40.22 miles) from the Kuwait border, making them the most forward deployed tactical strike aircraft in theater. The AV-8B flew 3,380 sorties for a total of 4,083 flight hours while maintaining a mission capable rate in excess of 90%. Average turnaround time during the ground war surge rate flight operations was 23 minutes.
source = Harrier
The Viffing is neat and may help you dogfight, but if the bad guys don't play your game that may not matter. Viffing to dodge missiles is a good thing, no doubt about it.
I don't know the loss rate in Desert Storm was. I saw myself one coming back to King Abdul Aziz with a big hole in the vertical stabilizer.
Walt