I think it might be good to talk about a distinction between uses of the kindle.
I have a fair amount of modern (say within the past 5 years) books
But I also have a fair amount of reference. I found some diy stuff and some medical stuff
O I really plan to look at the reference often? Not really...But I rather have that then the volumes and volumes of books for it.
When mp3 players came out 12 years ago many people assumed that it was JUST music. To a degree a majority of it is...but it's also audio books and podcasts.
Likewise with kindle people have magazines, newspapers, blogs etc. The books that I have (physically) long term seem to have been reference books. Gradually I would like to phase out my physical library.