BOOX: the closest thing to a normal Android tablet
Current BOOX tablets such as the Note Air6 C ship with Android and the Google Play Store. That gives you the broadest official route to third-party reading, cloud storage, research, note-taking and office apps. BOOX also provides per-app display controls through its E-Ink software, because one refresh setting rarely suits both a book and a scrolling inbox.
This freedom is the reason to buy BOOX, but it is also the complication. An app can be technically compatible while its animations flicker, its colors merge into gray or its handwriting support feels slower than BOOX's native Notes app. If one app is essential, check recent compatibility information and test its core task during the return period.