All ebooks should retain their marginalia
Hmmm. I am not at all sure that I want my notes kept with the book. One of the really good features is “my notes are mine”. I can get them even if I no longer have the book (think a library book that is annotated and returned).
I like unlimited lending.
I am not at all sure about the sale of “used bits”.
I vote for unlimited lending, but not sale of used.