Obsidian users likely tend to move between files a lot, making changes. Undoing these changes after closing a pane and then reopening that file is useful, but currently impossible.
Hello. First - new user to Obsidian and I LOVE it!
Remembering undo across tabs/editors is a must. All text editors that I use work this way - typora, sublime, vscode, atom, etc. It’s quite dangerous to work without this.