Any use:
Disable markdown V1- Help - Obsidian Forum
Plugin/theme for plain editing view source mode text - Help - Obsidian Forum
Disable markdown V2 - Help - Obsidian Forum
GitHub - dbarenholz/obsidian-plaintext: Adds support for plaintext editing into obsidian. My own purpose is to edit .bib files directly, but surely others can find reasons to use it.