I like using btrfs with Arch because of the snapshots. If an update breaks something I can just boot into a snapshot from grub keep using my PC and solve the problem later. It’s very useful… yes… very… you should try it… come… try btrfs… it’s warm and cozy… INSTALL IT!
Obsidian for notes, Libre Office and sometimes (please don’t punch me) Google Docs/Sheets. Oh and LaTeX with nvim for docs that need to look real nice.