Well if I have a tablet, it wouldn't be for Linux based apps, unless maybe some SSH/terminal stuff anyway. The apps mentioned would need to update to properly support tablets, if they haven't been yet.
When you use Play App Signing, your keys are stored on the same secure infrastructure that Google uses to store its own keys. Keys are protected by Google’s Key Management Service. If you want to learn more about
For apps created before August 2021, you can still upload an APK and manage your own keys instead of using Play App Signing and publishing with an Android App Bundle
I would recommend buying a pixel tablet and installing !grapheneos@lemmy.ml on it. !grapheneos@lemmy.ml is private and doesn't send anything to Google. You can get a pixel tab second-hand.
Your first post, you claim that "so any zero day could be active right now" ... This can happen with open source software too. Your phone is way more secure than the average PC running debian.
I agree 100% it's upsetting how little people know about technology they use everyday. To many and you, installing a new OS is easy as breathing air, to the average person, it's like learning to ride a bike for the first time. We have to slowly teach those, willing to listen and learn.
That'd be a good idea