Your reality, sir, is lies and balderdash… and I’m delighted to say that I have no grasp of it whatsoever!
I don’t think that Note Station has been updated (other than maybe security patches) for years. I tried it when I was looking for an Evernote replacement and was shocked how basic it is.
Sure I’m not going to be the first one to ask you this but have you tried Obsidian?
I do the same thing. I’ve tried Kavita and Audiobookshelf and ended up just keeping the books on a network share and then accessing them through Calibre. I am sideloading to a Kindle though.