Look. Both Recorders have been found
The plane itself would have to be found sooner or later for a couple of reasons, both for humanity and for investigation.
The only real super mystery , no black box, no plane situation is MH370 and we may find that in time.
AND EVERYONE WANTS TO CHANGE EVERYTHING> I think mainly because people can't watch TV news anymore.
I'd rather spend the money on overlapping doppler wx radar from the ground on ATC radar and sending ground wx radar to planes for pilot evaluation.