You say that, but it's clearly not true. Imagine all the problems of the DMV as it is now, plus dealing with a buggy blockchain app where people use malware to steal your car registration. Or, in 10 years, when you have to download and install buggy, poorly-maintained apps and figure out how they work, just to sell your car. It can definitely be worse.

Fair enough. It's hard to imagine a worse DMV, but anything is possible!