I use BTRFS on my Artix system, Ext4 on my Librem 5, Ext4 on my Devuan laptop and Ext4 on my Pinebook Pro. Basically when given the choice in the installer I choose BTRFS but if the installer doesn’t let me pick I don’t care enough to manually partition. I have had no negative experiences with any file system luckily so I just roll with whatever.

I have never used Discord and never will. No project has ever been able to change my stance on it.

I used the automatic options for disk partitoning so i’m unsure.

A libre version of Devuan. It uses the libre kernel by default and doesn’t ship with any closed source programs or drivers in the repos.

https://www.gnuinos.org/

Yep that is accurate.

Trisquel would be my choice although not sure if the Framework wifi is compatible witht he libre kernel. If not I would probably use Linux Mint or Garuda.