I've got a Palma 2 and I like it. It replaces the Kindle for me: fits in the pocket, more book apps, actual feed reader and read later apps, good for typing quick notes and using Anki. You can also use Terminus to ssh to a box in a pinch.

I would never think of daily driving it as a phone if it had a modem. The biggest dealbreaker is that streaming music is a pain on e-ink devices: all of the services except Apple Music (which doesn't support 2FA sign in on Android so it's useless to me) are dark mode only, and dark mode is the enemy on e-ink. Another problem is that the camera is pre smartphone level, it's really bad and with e-ink it's harder to see if the focus is good. And of course, it's running an obsolete version of Android and is continuously phoning home to China, so you probably don't want any important data on it. But as an e-reader, I strongly prefer it to the walled garden tablets.