Pretty decent recent article. But...rear seats are fixed? 2019 Toyota Prius Prime Advanced review: Serious mileage – Brinkwire
The reviewer must not have actually laid hands on the car. Perhaps just looked in through the windows? A lazily written article. One example - thank you Captain Obvious: “Taking full advantage of that electric range also requires regular charging.”
Did the reviewer actually have the car for a week or just took it on a 15 minute test drive? It's a split-folding 60/40 rear seat.