Same stuff used for years...AV8Bs did more damage to the decks than this...This aircraft is designed to mitigate a lot of that damage...It looks pretty knarly with the single jet blast coming down like that, but put this vid side to side with a Harrier and you will see a tremendous difference...
I’ve noticed Harriers in vertical taking off and landing in an unstable manner, rotating horizontally, pivoting 10-15 degrees in each direction while the F-35 does it without the slightest instability as if on railroad tracks.