And lo, as the prophecy foretold, California's digital license plates are totally hackable, giving away GPS location and user info:

https://jalopnik.com/researchers-hacked-californias-digital-license-plates-1849966295

Researchers Hacked California's Digital License Plates, Gaining Access to GPS Location and User Info (Update)

Just months after release, cybersecurity researchers have hacked Reviver Rplates and gained access to GPS location and sensitive user data.

Jalopnik
@evacide Can anyone explain why anyone would want these in the first place?
@jeffjarvis @evacide Because otherwise you have to receive a sticker in the mail or from the DMV office, open the envelope, go out to your car, maybe clean off the license plate a little bit, and put the new sticker on over the old one. And you have to do this every. single. year. With a digital license plate you are saving minutes, maybe even multiple hours, over the course of your lifetime.