Care to elaborate on ‘the risks of flatpak’. If you are refering to the practice of people using unofficial flatpaks: Yes I think that poses a certain risk because you are adding an additional party to your threat model.

Oh man I still remember the day I learned of the existence of Knaps and their shared libraries (Wrapz).

relevant: https://davidgerard.co.uk/blockchain/2024/05/10/jack-dorsey-bluesky-decentralised-social-networks-and-the-very-common-crowd/

I saw the thumbnail and thought this was a map of The Netherlands

Alpine Linux

Pocketbook also makes great devices, not that well known outside of EU but their software has more features than Kobo and is (as of yet) not in the book selling market so no conflict of interest (and no analytics, contrary to kobo).