What features are you missing?

The database is simply what people have put on open street map. So it can be extended easily by everyone.

Here is a google free alternative: LavSeeker

You don’t need a cert authority to self-sign. You can do it once and be good to go.

You’re having GPS on all the time and worry about battery drain when disabling it? That does not make sense mate.

That’s why tools like keepass allow you to require more than just a password to decrypt.

Yet

With the same consequence, you should also assume location, audio and video to be not be private when carrying these devices

Yup thanks for the heads-up!

Yup piper is a good option. install:

• extra/speech-dispatcher
• aur/piper-tts-bin
• aur/piper-voices-common
• aur/piper-voices-…-…

Then configure speech-dispatcher according to arch wiki and enjoy TTS via command line spd-say or in firefox directly (switch to reading mode for a website).

It differs between software vendors and versions. For example, if you’re using a recent version of gnupg, your key is most likely stored using openpgp-s2k3-ocb-aes. Use that as a starting point to find more information on how good the protection is. I personally would rate it a fair bit lower compared to the key derivation methods used in keepass which focus more on brute force resistance.

You should not store your privates keys unencrypted. In fact by default your keys are stored password protected just as if you’d store them in keepass.