I'm an ardent Emacs user for the past 20+ years. But I am considering writing a book, and the "throw things in anyhow, get things back" facility of Obsidian is quite useful for catching disparate thoughts to later incorporate into a flow in the final text.. Of course there is a mode in Emacs supporting obsidian-like facility, but does not feel as convenient - autocomplete never quite works as smooth as it does in Obsidian. For now, I am very impressed with the simplicity of Obsidian's usage.