I’m not sure I understand, epub is both the industry standard and an open format, as far as I know. Why not work on using it or build it around epub from the get-go?
I have to admit I’ll have to wait for the project to start implementing epub to consider getting on board, but it’s still a great effort.
It looks like it is powered by a microcontroller. Maybe it isn’t powerful enough to support epub?
It’s a 120mhz Arm CPU. That’s more than enough for epub. For comparison the 25 Mhz 68030 in the Next computer used Adobe Postcript (PDF) as it’s GUI.
Probably because the computational hardware is not powerful enough to implement a (proto) web browser
It’s a raspberry pi pico. Ebooks could probably work with it on the new version.
It said it’s a 120mhz SAMD51 ARM Cortex-M4.
There’s a version with the pi pico https://github.com/joeycastillo/The-Open-Book