Do you mean paper books? They are incredibly impractical: bulky, heavy, unsearchable...

I wrote a historical novel last year that I self-published on Amazon, on paper as well as Kindle. To my surprise, 80% of my sales are paper. It's in French, and the French are notoriously conservative, but still...

I don't care one way or the other what other people do, but for me the only time I buy paper books is if there is no electronic version, or the ebook is priced something like €15 and it's possible to find a used copy for 50 cents.