Seriously. I see exactly one use case, and that’s for criminals of one sort or another to mask their identity during the commission of a crime. It’s not like law abiding citizens are able to use them to protect their privacy in any way.

It’s not like digital IDs, where it’s one less thing to carry and potentially more secure. Your plate or this plate are fixed to your car the same way, both are (legally) static, and the only thing that changes is the ease of faking your plate.