I've considered CalyxOS but prefer the hardening of GrapheneOS with no gapps - still means a phone decent on privacy. However I do try to keep an open mind, so if CalyxOS has additional privacy benefits to my existing setup I'd be interested.

I agree with the proprietary style of ProtonMail point, and my workaround for multiple accounts has been to use my own domain and have email rules for delivering messages to the respective folder. I don't have immediate plans to move from them, but I am watching the news cycle and have considered Tuta as an alternative.

I haven't used ReVanced, but I remember the original YouTube Vanced was a mod of the original YouTube apk - if that's still the case, I feel like ReVanced would offer even less privacy than Invidious or NewPipe. However I'm happy to be corrected.

I personally use Nextcloud notes but the Obsidian setup you have sounds interesting, especially if it's like OneNote - I'll keep it in mind!

Completely agree on your Nextcloud points - I uploaded my uncompressed Telegram archive to it, which took like 12 hours over my Gigabit lan. I suspect it hated the sheer amount of small files