Honestly I see no use for the ai response in search as it is hard to trust 100% but I do see that it could become a requirement for a search engine

Tasks.org, synced to nextcloud using webdav

Proton VPN is good and has a good free plan, but os doesn’t matter when choosing a VPN

Probably every comment but install linux

Could set up a nextcloud instance, but might be a bit overkill for your use case as it is a full Google workspace replacement

Antennapod is good

When it breaks + the replacement cost as much as the phone costs (I generally buy secondhand)

I would recommend proton drive as a great replacement if you want something that doesn’t need a server

The closest is nextcloud collectives, tables, tasks and deck

I personally like Nextcloud notes for quick notes and nextcloud collectives for detailed stuff e.g revision. With nextcloud tables and deck it makes a great notion replacement