True, but be prepared to find that they've been made an integral part of your vehicle's electrical and computer systems. Remove them, and you may end up disabling the car.
I see a new business opportunity - replacement black boxes. Probably expensive and difficult but... Or maybe something that you plug the wiring harness into, then plug into the black box, and it feeds it bogus or scaled data... But that would probably mess up engine management... Best bet, aftermarket simplified, standardized black boxes...
There will be a market for devices that can replace them without disabling you car.
Just like there are devices today that enhance the performace of your car by bypassing certain emitions crap.
There will be plenty of “foolers” for these things in the future.