One great solution for that would be the approach many advanced Markdown editors like Obsidian have: the documents remain usable. You might lose some benefits (

One great solution for that would be the approach many advanced Markdown editors like Obsidian have: the documents remain usable. You might lose some benefits (the integration between documents in a graph-like structure) that are specific to the tool. Still, your work is preserved in a universal format that anyone can leverage. Most elements of Nano have widely accepted standards, presumably easy to integrate, so that guarantee should be doable.