yea i’ll add in the plaintext view soon, but i truly hate notebook nesting notebooks/folders tbh, so i’ll likely never add that feature. If you notice that they’re are too many notebooks in the sidebar i recommend hiding them (since you rarely are probably using more than like 5 at a time) or collapsing the section. Also consider using tags to improve filtering notebooks. That way the sidebar and your notes can stay “flat”.
Discussion
You're not wrong. My Joplin is an absolute mess.
I had a similar problem with obsidian, i kept having to refactor the folder structure and it let me do way too much nonsense imo that stopped me from just writing content/taking notes. In comet there is a tag view scoped to each notebook so you can break a notebook up by tag (without the notebook being polluted by all tags), and even further the more tags you add. You can add a tag by just putting a hashtag in the note content.