In 2031, it should be possible to by a long-past-warranty 2021 EV, replace the battery pack (with one made from recycled EV batteries!), and have it just-work. Just like you can replace the engine of a classic car today if you are so inclined.
It should be possible because the electrical connection of the batteries to EV drivetrains are relatively simple - although I'm sure that will take a lawsuit (like was launched against Nespresso to allow 3rd party coffee pods) for EV manufacturers to release the specs required for this to happen.
It would be unfortunate if EV batteries were non-serviceable except by the manufacturer after they were out of warranty, like phones are today. Instead, battery replacement would potentially allow the tertiary used EV market to flourish, and make them more accessible to people of modest means.
I didn't have to read an article to see that it's pure speculation based on nothing.
Yes, it could surge to $50k, or it could also fall to $50. Technically it is true.