Reason 316 why I don’t have a cell phone. Much of what you posted is negated if you don’t have a cell phone. Not all of it, but much of it.
I doubt a pre-2000 vehicle could be retrofitted with a black box. The necessary electronics just aren’t there.
You realize that the contents of a black box essentially mimic that of most modern smartphones?
Speed, direction, location... all of it could be determined by something the size of a deck of cards. No new electronics required.
We’re keeping our two 1996 Chevy Impalas, our 1984 Trans Am, and our 1973 Pinto.
In the case of an EMP, that Pinto will be the only working vehicle for miles around.