homegrowntechie
Trilium is an excellent option, however, the original project is no longer maintained. There is a new community fork that is active here: https://github.com/TriliumNext/Notes
+1 for the open source option: Trilium The project is being maintained here: https://github.com/TriliumNext/Notes
perfect! This project may help your migration. I’m pretty sure the script is broken currently, but if you tinker with it a bit, perhaps it could speed up your migration: https://github.com/meichthys/onenote-html-export
Currently there are no significant new features (although we do now offer a windows exe installer). The initial stable release was mostly back-end changes intended to make future development easier and more maintainable. Keep you’re eye out though, since there are some new features in the works (2FA, Internationalization, and maybe some mobile improvements).
I can see your point, I should have clarified that I never use an external editor myself to edit the notes, I was just saying that you could do that if you needed to. I only export to Nextcloud so I can view it there just as I would have to save to Nextcloud if I was using Obsidian or some other file-based note-taking app.