I have a not-eReader 078 (back then it was just called not-eReader before the 10" sibling came to be) and it's an incredible device for a super small niche: secondary screen for an emergency laptop. https://imgur.com/a/xmRmYSn especially https://i.imgur.com/eV7qq8Y.jpg .
Notably there has not been a successor to the One Mix Yoga 2S. Later devices are larger, the current crop of handhelds are gaming handhelds with appropriate controls without a keyboard. Even the Ayaneo Air 1S which only has a 5.5" screen is 224mm wide where the Yoga 2S was 182mm. It's a little narrower though. I might buy it and use it with the ancient Samsung NP-Q1 keyboard.
Notably there has not been a successor to the One Mix Yoga 2S. Later devices are larger, the current crop of handhelds are gaming handhelds with appropriate controls without a keyboard. Even the Ayaneo Air 1S which only has a 5.5" screen is 224mm wide where the Yoga 2S was 182mm. It's a little narrower though. I might buy it and use it with the ancient Samsung NP-Q1 keyboard.