To be fair you can just keep using Obsidian or similar apps on your phone for this, along with an external sync solution like Syncthing. I tried it for a bit i

To be fair you can just keep using Obsidian or similar apps on your phone for this, along with an external sync solution like Syncthing. I tried it for a bit in the past, the main friction is apps formatting Markdown slightly differently (indents, blank lines).