In general, yes. Also it would be better for the environment, even if you want to avoid washing the ball up and use tea filters

It does! Basically any package is offeted. There’s also a mobile app for Android and iPhone. Just take a look at obsidian.md

Obsidian has very rich support scripts and workflows documented for MacOS - I highly recommend it

Disclaimer : not an Apple user, not a lawyer

This should be illegal by European law. Without further knowledge it seems like a prime example for the GDPR letter of death and a pretty solid case for data protection lawyers