Plunging Car Sales, page-216

no, battery tech is NOT changing rapidly. It isn’t changing at all. There is a lot of research going on, but until there are any successes we’re stuck with ‘70s technology. Flow batteries are not viable for autos, supercaps may be but no ones done it yet, there’s sodium and mag air, and, and, but nothing yet.

and no, you can’t buy a Rivian next year because they won’t be available.