What this bloke says, but I’ll expand it to say stop treating any digital medium like it’s physical ancestor. I get irrationally annoyed at work when we’re instructed to turn something that will never be printed on paper into an A4 sized PDF. It’s usually to mimic some governmental form, surprise surprise.
I’ve also grumbled about footnotes in books before - the content is either important enough to appear in the body of the text or it isn’t. I don’t think I’ve ever encountered a book on my Kindle that shows footnotes in a little pop-up dialogue though. I’d perhaps complain about them less if it wasn’t such a chore to get to the footnotes and back again.