A german magazine just made a video on that topic. You can activate english subtitles.
https://www.youtube.com/watch?v=hBSEHpU-pyI
They tested a bunch of smart tvs and tv-sticks and their network activites.
They say that roku devices were the most privacy friendly tv-sticks.

And if you dont care about warranty voiding, open the tv and tape the things you dont want. Mic, cam, etc. Its probably the cheapest option

His stance on desktop security may be very hard. But his views are not far off from that of other known security researchers like Micay (Copperhead/GrapheneOS), Rutkowska (QubesOS), Matthew Garrett (Red Hat, Canonical), Solar Designer (Openwall) and others. They heavily criticize Linux and *BSDs to make us aware of all its shortcomings.

Systemd is hated by hobbyists mainly because it invalidates a lot of their hacked together wisdom ...

Maybe these people dont hate systemd but want choices for a more minimal/barebones OS. Not to gatekeep Linux but to install a more energy-efficient, lightweight Linux OS for themselves like many Alpine, Debian and Arch users do. They believe in the KISS principle. The concept that less complexity equals better security ("less is more").

There are some security, privacy and stability advantages of other init systems over systemd. But for most people systemd should be fine.

See here for further info:
https://madaidans-insecurities.github.io/guides/linux-hardening.html#choosing-the-right-distro
https://forums.whonix.org/t/fixing-the-desktop-linux-security-model/9172/2
https://www.unixsheikh.com/articles/systemd-isnt-safe-to-run-anywhere.html
https://unixsheikh.com/articles/the-real-motivation-behind-systemd.html
https://suckless.org/sucks/systemd/
https://without-systemd.org/wiki/index_php/Arguments_against_systemd/
https://nosystemd.org/

Also getting encrypted dns to work with systemd is pretty tough and unreliable in my experience (with debian and opensuse). See here https://github.com/DNSCrypt/dnscrypt-proxy/wiki/Installation-linux

Looks like there are some security, privacy and stability advantages. But for most people systemd should be fine.

See here for further info:
https://madaidans-insecurities.github.io/guides/linux-hardening.html#choosing-the-right-distro
https://forums.whonix.org/t/fixing-the-desktop-linux-security-model/9172/2
https://www.unixsheikh.com/articles/systemd-isnt-safe-to-run-anywhere.html
https://unixsheikh.com/articles/the-real-motivation-behind-systemd.html
https://suckless.org/sucks/systemd/
https://without-systemd.org/wiki/index_php/Arguments_against_systemd/
https://nosystemd.org/

Edit: also getting dnscrypt to work with systemd is pretty tough and unreliable in my experience (debian and opensuse). See here https://github.com/DNSCrypt/dnscrypt-proxy/wiki/Installation-linux
This could be a problem if you are planning to use encrypted dns.

Debian Stable is a solid choice as it has the best support and is a hassle-free experience. Maybe with KDE Desktop. Its the most userfriendly windows-like desktop i know of.
Optional: You can also install the MX-Tools from MX Linux to get some comfortable GUI system tools.

Just use a second phone for that proprietary stuff. So you dont have to comprise privacy/security on your main/private phone. Also a huge fan of xprivacylua to isolate proprietary apps and feed them random data.

Maybe MX linux or AntiX Linux. They are very thumb drive focused

You can use posteo for 1€ a month. For more aliases look at mozmail (mozilla) or simplelogin. Or try runbox if you dont care about encryption at rest

Beagleboards are great. Good Support and nice community. Nearly as good as Pi. I used BBB because it was the only open hardware SBC available in my area.

BTW: Please recommend me other good Open Hardware/Open Firmware SBCs. I am always looking for something new. Maybe for a Router or Selfmade-NAS.

grsync, its easy to use

OpenSuse Leap. In YaST (its system settings tool) you can do everything from a GUI. No cli, no config files, no tinkering.

i would go for the most used routers because they have the best support. look at the download statistics to get an idea of which ones are the most popular routers atm.
I just bought a used Archer C7 v2 because its popular and i could get it cheap in my area.

and check out this link: https://openwrt.org/toh/recommended_routers