I looked at Obsidian some years ago, and it really just didn't fit the way I work. When I found Joplin I got it set up so I have it everywhere (desktop, laptop, phone, tablet, etc.) with everything being secured and in my control...(ie, I don't use any third-party syncing service).

So, I think I'll just keep it the way I have it now, and use NovelWriter for working on my book(s).