[Quoth]

I'm not interested in sync, and on rare occasions when I read on more than one device search is often quicker. Sync means connecting to wifi twice and if not at the same time, a 3rd party server.

I'd like better dictionaries and more translation dictionaries, but in terms of finding the next book to read and reading it, none of the popular Android Apps nor KOReader come close to the Kobo "My Books" interface.
Fonts are no issue.

I've been reading books for decades and ebooks since 2002. Android as an OS is terrible and an Android phone or tablet (not dedicated), even with eink, compared to a dedicated Sony / Kindle/ Nook/Kobo is terrible unless there is some app I've not tried? (I'm not going to use Kindle or Kobo app on Android).
Sage is main reader. I might occasionally read on the phone or the 4.7" pocket Y-Ben that lives in jacket, but I can't see the point of sync. I do have loads of ereaders and ereader apps, to test formatting.

Edit:
I control content on all the ereaders and apps from Calibre, except for library loans.

Calibre can sync Kobo reading status and position via Kobo utilities.
I keep the user content the same on my workstation, server and laptop using rsync and also do backups.