I'd not heard of this model, and amusingly my first hit (4th in an incognito) for `Boox Palma` is a lengthy reddit-user rant from 2y ago about build quality, sluggish performance, and woeful battery life.

That aside, totally agree on the form factor. My first ebook reader was a pocketbook 360, which came bundled with a rigid cover (would snap onto the back while reading) and a 5" screen, when most ebook readers were around the 6" diagonal.

The size delta was significant as it meant the difference between fitting in a jacket pocket vs needing to carry a bag, and that really changes your likelihood to take it with you / read a book.