Awesome :D

Extremely well written sum-up, learned a lot about how to approach an investigation like this. Thank you.

I switched from OneNote to Notion a while a go, one major reason being the possibility to easily export notes in Markdown format. I think it's working pretty well, or am I overlooking something?

Notion's export used to dump it all in one opaque blob of files with no structure aside from some CSV files that roughly described where things went. Maybe they haven't used it since Notion changed it to use folders.