I agree that NO modem is preferable. In fact, no wifi or wireless at all, or at least the ability to physically turn off wifi/bluetooth would be my preference. Airgapped machines are hard to come by these days, and practically nonexistent in this form factor, let alone epaper. I mean to use this device as a secure journal/2fa device.
For KEYBOARD, I made a post in the accessories subforum about my dream peripheral. A low-profile split keyboard that fit flush against the BACK of the tablet, facing outward. This way when holding the device in landscape, my fingers would hover over a full set of keys on the back of the device. This would work with how I naturally hold large tablet devices. On either side of the face of the tablet would be a few front-facing thumb accessible keys. This would be possible to prototype extremely easily with current open source pcb files and off the self components, and a little bit of velcro!
My fantasy is to be able to touch type at high speed, and not have to do all of the typing with my thumbs a la blackberry style keyboard.
