duck1 I thought about it and have some hard requirements, that android just doesnt meet.
Image editing
Snapseed with disabled Internet is okay, on a phone. But no replacement for GIMP and Inkscape. All apps remotely compatible are proprietary, cloud-based garbage.
Music & Video
MPV / VLC, Grayjay, Anrimians Music Player, Antennapod
This is way more than enough, also way more nice music players than on Linux. Grayjay also beats Freetube.
Office
Collabora Office, has a completely useless UI on mobile, have not tested its convergence. The Microsoft stuff all has arbitrary requirements for internet, years ago.
Scientific stuff like RStudio etc. are also not working.
Mail
K9-Mail is okay and simple to use. I have used Fair-Email also with Pro (but lost the key...) and it was too complex for the phone.
Maybe Fairemail has more features like PGP?
K-9 is really restricted
- no flexible sender address
- no local mail filters
- bad three column support, no resizing etc.
- no PGP at all
- no extensions like DKIM Verifier
Games
Mostly just 2D things, I dont play much, and WINE on Android may become a thing some time soon. Dont care, but Android really is phone only.
System stuff
Syncing works, kindof. But tools like the screenshot tool have hardcoded file paths. You cant backup internal app storage a lot of times. You cant really handle real external drives that are not exFAT. Using encrypted cloud storage with Cryptomator is a pain.
There are many things like reliability (not being allowed to break my system ;) ) that make GrapheneOS/Android a great companion/main OS, but it is not really good if you are used to stuff like KDE Plasma.
File management for example is horrendous.
And so on... Androids Tablet market is abysmal, if things are coming they are often proprietary garbage. I think a Linux tablet would have better apps, while being less secure.