I've just heard about the Poke5S successor on the grapevine.
Supposedly it's a Carta 1300 screen.
There is a 3.5.1 update out for the Poke5S, but that's a Chinese model.
Same with the Chinese Poke5 (no suffix).
What US users have is actually the Poke5P.
I see on
https://shop.boox.com/products/poke5 that the old Poke5P is sold out in the US.
One never knows if that's wavering supply or end-of-life.