Debian with Flatpak and a Distrobox container running Arch is pretty good if you want a stable desktop with rolling packages.

Ext4 with LVM.

I like BTRFS and it’s features but sadly Debian doesn’t have a preset for it in it’s installer so the only way to use it is to manually partition and I absolutely suck at that.

Proton recently introduced an AI “writing assistant” for emails called Scribe and a bitcoin wallet sadly.